A referral to a cardiogram is issued in such cases:
- Pain in the heart, shortness of breath while walking.
- In the presence of signs of arrhythmia, ischemic disease, myocardial infarction.
- Before a series of operations, not only on the heart, but also on other important organs.
- In the presence of third-party diseases (ear, throat, nose) that give a complication to the heart.
- During a medical examination of pilots, athletes and drivers.
- To register heart activity.
- For the diagnosis of diseases with symptoms of irregular heartbeat, dizziness, fainting.
- To adjust the operation of pacemakers and implants.
- A cardiogram is recommended to be done annually for men and women after 45 years.
- During pregnancy.
- The main objectives of the survey
- Various methods and indications for them
- Stress test
- Types of ECG tests
- Who and when appoints the study
- How to prepare for the procedure?
- Technique of execution
- Decryption of the totals
- What can affect the result of the ECG
- Pathological disorders of the heart
- Cardiogram of the heart: decoding and the main diagnosed diseases
- What to do if abnormalities are found
The main objectives of the survey
Decoding a cardiogram is a long process, which depends on many indicators. Before deciphering a cardiogram, it is necessary to understand all the deviations of the heart muscle.
Atrial fibrillation is characterized by irregular muscle contractions, which can be completely different. This violation is dictated by the fact that the cycle sets not the sinus node, as it should happen in a healthy person, but other cells. The heart rate in this case is from 350 to 700. In this condition, the ventricles do not completely fill with incoming blood, which causes oxygen starvation, from which all organs in the human body suffer.
An analogue of this condition is atrial fibrillation. The pulse in this state will be either below the norm (less than 60 beats per minute), or close to the normal value (from 60 to 90 beats per minute), or above the indicated norm.
On the electrocardiogram, you can see frequent and constant contractions of the atria and, less often, the ventricles (usually 200 per minute). This is an atrial flutter, which often occurs already in the phase of exacerbation. But at the same time, the patient tolerates it more easily than flickering. Circulatory defects in this case are less pronounced. Anxiety can develop as a result of surgical interventions, with various diseases, such as heart failure or cardiomyopathy.
Conduction Disorder – This type of heart disorder is called blockade. The occurrence is often associated with functional disorders, but there are also the result of intoxications of a different nature (against the background of alcohol or taking medications), as well as various diseases.
There are several types of disorders that the cardiogram of the heart shows. Decryption of these violations is possible according to the results of the procedure.
Sinoatrial – with this kind of blockade, there is difficulty in exiting the impulse from the sinus node. As a result, there is a syndrome of weakness of the sinus node, a decrease in the number of contractions, defects in the circulatory system, and as a result, shortness of breath, general weakness of the body.
Atrioventricular (AV block) – characterized by a delay in excitation in the atrioventricular node for longer than a specified time (0,09 seconds). Here, several degrees of this type of blocking are distinguished.
The number of contractions depends on the magnitude of the degree, which means that a defect in the blood flow is more difficult:
- I degree – any compression of the atria is accompanied by an adequate number of contractions of the ventricles;
- II degree – a certain amount of atrial contractions remains without compression of the ventricles;
- III degree (absolute transverse block) – the atria and ventricles are compressed independently of each other, which is clearly shown by the decoding of the cardiogram.
Ventricular conduction defect. An electromagnetic pulse propagates from the ventricles to the heart muscles through the trunks of the bundle of His, its legs and branches of the legs. Blocking can occur at every level, and this will immediately affect the electrocardiogram of the heart. In this situation, it is observed that the excitation of one of the ventricles is delayed, because the electric pulse goes around the block. Doctors divide the blockage into full and incomplete, as well as permanent or intermittent blockade.
Myocardial hypertrophy is well shown by a cardiogram of the heart. Decoding on an electrocardiogram – this condition shows a thickening of certain sections of the heart muscle and stretching of the heart chambers. This happens with regular chronic overload of the body.
Next, we’ll talk about how to decipher a cardiogram by transforming the contractile function of the myocardium, there are several changes:
- Syndrome of early repolarization of the ventricles. Often, it is the norm for professional athletes and people with an inherently large body weight. It does not give a clinical picture and often passes without any changes, so the interpretation of the ECG is complicated.
- Various diffuse disorders in the myocardium. They indicate an eating disorder of the myocardium, as a result of dystrophy, inflammation or cardiosclerosis. Disorders are quite susceptible to treatment, often associated with a disorder of the water-electrolyte balance of the body, taking medications, heavy physical exertion.
- Non-individual changes ST. A clear symptom of a myocardial supply disorder, without bright oxygen starvation. Occurs during hormone imbalance and electrolyte imbalance.
- Distortion along the T wave, depression ST, low T. The cat’s back on the ECG shows the state of ischemia (oxygen starvation of the myocardium).
In addition to the disorders themselves, their position in the heart muscle is also described. The main feature of such disorders is their reversibility. As a rule, indicators are given for comparison with old studies in order to understand the patient’s condition, since it is almost impossible to read the ECG yourself in this case. If a heart attack is suspected, additional studies are being conducted.
There are three criteria by which a heart attack is characterized:
- Stage: acute, acute, subacute and cicatricial. Duration from 3 days to a lifelong condition.
- Volume: large-focal and small-focal.
Whatever the heart attack, this is always the reason for putting a person under strict medical supervision, without any delay.
An ECG procedure is a way to determine the electrical activity of the heart muscle. Its biological potentials are recorded by special electrodes. The total data is displayed in graphical form on the monitor of the device or printed on paper. Electrocardiography allows you to determine:
- Conductivity of the heart muscle and the frequency of its contractions.
- The sizes of the atria (the departments into which the blood flows from the veins) and the ventricles (calving that receives blood from the atria and pumps it into the arteries).
- The presence of violations of the electrical impulse – blockade.
- Myocardial blood supply.
To conduct an ECG study, special preparation is not required. With its help, it is possible to identify not only a violation of the functional activity of the heart, but also pathological processes in the vessels, lung tissue and endocrine glands.
An electrocardiogram is considered the main way that can diagnose such dangerous diseases as congenital and acquired heart defects, arrhythmia, heart failure, myocardial infarction
Various methods and indications for them
In order to make an accurate diagnosis, practicing cardiologists use a comprehensive examination of the heart, which includes several methods.
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The most common method for studying the direction of electrical impulses and their strength. This simple procedure lasts no more than 5 minutes, during which time the ECG can show:
- violation of cardiac conduction;
- the presence of an inflammatory process in the serous membrane – pericarditis;
- condition of the heart chambers and hypertrophy of their walls.
The disadvantage of this technique is that it is performed at rest of the patient. It is impossible to fix those pathological changes that occur during physical and psycho-emotional stress. In this case, when diagnosing a disease, the doctor takes into account the main clinical signs and the results of other studies.
Long-term registration of indicators allows you to detect a violation of the functional activity of the patient’s heart during sleep, stress, walking, physical activity, and running. The Holter ECG helps an experienced specialist in studying the causes of irregular heart rhythm and identifying the early stages of ischemia – insufficient blood flow to the myocardium.
Monitoring the work of the heart muscle during physical exertion (training on a treadmill or exercise bike). This method is used if the patient has periodic cardiac abnormalities that at rest do not show an ECG. The load test provides the doctor with the opportunity:
- find the reasons for the deterioration of the patient’s condition during physical exertion;
- detect the source of sudden changes in blood pressure and sinus rhythm disturbances – the most important indicator of the normal functioning of the heart;
- monitor the patient’s condition after heart attacks or surgery.
The data shown by the cardiogram of the heart allow you to choose the most suitable medications and monitor the results of therapy.
Although cardiography and a routine research method, it also has indications. To determine the cause of pain or discomfort in the chest area, the patient consults a therapist or cardiologist. The doctor initially collects an anamnesis, examines, measures the pressure and pulse, auscultates the heart, and then sends it to the study in order to find out what the cardiogram shows.
Indications for ECG:
- chest pain (suspected angina pectoris or myocardial infarction);
- discomfort in the heart after a viral or bacterial infection;
- abnormal heartbeat, interruptions in the work of the heart muscle.
Be sure to conduct an ECG in such cases:
- during hospitalization in a stationary department of any profile;
- before surgical interventions;
- during preventive examinations of adults;
- for students when choosing a group of physical education classes.
An electrocardiogram of the heart is used both for the initial diagnosis of pathological conditions and for monitoring the dynamics of the disease. When prescribing drugs, the doctor relies on the subjective sensations of the patient and on ECG data that reflect the actual changes in the cardiovascular system.
Classical ECG removal helps to see how the myocardium and the cardiac conduction system behave at the moment. In many cases (preventive examinations, normal pregnancy), a normal cardiogram is sufficient. But there are situations when the patient complains of the appearance of pain or shortness of breath only during stress or physical exertion, or at a certain time of the day, and the film does not show characteristic changes in rhythm or pathological teeth. In such episodes, additional types of cardiography are used.
With angina pectoris, it is not always possible to fix changes on the ECG, so you have to use the stress ECG option or the treadmill test. This method involves performing physical exercises (treadmill or bicycle ergometer) while recording a cardiogram.
Indications for performing a stress test:
- diagnosis of angina pectoris and determination of its functional class;
- monitoring the effectiveness of the treatment of coronary disease and angina pectoris.
In addition, there are a number of contraindications to such a procedure:
- acute period of myocardial infarction;
- unstable angina;
- arrhythmia, severe blockade;
- decompensated heart failure.
Another specialized type of ECG is halter (XNUMX-hour heart rate monitor). To perform this procedure, electrodes and the recorder itself are attached to the patient’s body, which is small in size and measures electric potentials around the clock. Read more about this type of cardiography in the article “The method of Holter ECG monitoring.”
Types of ECG tests
An electrocardiograph is used to perform the standard procedure. Such devices are widely used in cardiology hospitals, as well as in ambulances. With the help of suction cups, the electrodes are attached to the human body, later electrical potentials come through them.
The electrodes are called “leads”, in total 6 pieces are installed. Leads attached to the limbs are considered basic and are designated-I, II, III and aVL, aVR, aVF. Electrodes on the chest are labeled V1-V6.
Each type of lead has a specific task, so individually factors give different values. The doctor needs to combine all the information into one whole and decrypt the cardiogram.
The graph is displayed on special graph paper. Each lead has its own schedule. In standard application, the tape speed is set to 5 cm / s, and if necessary, it can be adjusted.
Unlike the standard procedure, the duration of which is several minutes, during Holter monitoring, information is recorded during the day. The duration of the procedure is explained by the need to get a complete picture of the processes taking place in the heart. Such a procedure is capable of taking readings, not only during a person’s peace of mind, but also during physical exertion.
Some diseases are difficult to detect during a normal cardiogram, since deviations can occur only during activity.
Specific procedures for obtaining a cardiogram are also distinguished:
- Exercise monitoring. Thus, it is easier to establish pathologies in the work of the heart. A treadmill is used for such monitoring, it helps to give the body the required load. Apply the procedure in situations where pathologies appear only during accelerated heart function.
- Phonocardiography. This method can be used to study not only electrical indicators, but also the noises that occur in the heart region. This method is used in the diagnosis of heart disease.
Conventional cardiography does not harm the human body – the equipment only captures cardiac impulses and does not affect other tissues and organs. That is why a diagnostic study can often be done to an adult, a child, and a pregnant woman. But conducting a stress ECG is not recommended for:
- hypertension of the III degree;
- severe coronary circulation disorders;
- exacerbation of thrombophlebitis;
- acute stage of myocardial infarction;
- thickening of the heart walls;
- diabetes mellitus;
- severe infectious and inflammatory diseases.
In most cases, the procedure is carried out for everyone, including for young children. It is necessary to abandon the ECG only in case of violation of the skin condition at the points of attachment of the electrodes. It should be remembered that in case of emergency hospitalization, the cardiogram is removed in any case.
Who and when appoints the study
A sheet with a referral to a cardiogram is issued by the attending physician or cardiologist. If you have complaints or heart problems, you should immediately go to the hospital for an examination. This procedure allows you to check the condition of the heart, as well as determine the presence of deviations.
Using an ECG, you can identify a number of certain pathologies:
- the formation of expansion in the area of the heart chamber;
- changes in the size of the heart muscle;
- the development of necrosis in the tissues with myocardial infarction;
- ischemic lesions of the myocardial wall.
How to prepare for the procedure?
Implementation of complex preparatory measures by the patient is not required. To obtain accurate research results, you should sleep well, limit smoking, reduce physical activity, avoid stressful situations and food stress, eliminate the use of alcohol.
An ECG (decoding in adults implies the exact procedure, the treatment depends on the results) is carried out after the doctor explains the main nuances of the preparation so that the results of the study become as correct as possible:
- a few days before the ECG should abandon the use of alcohol;
- it is advisable not to smoke on the day of the procedure;
- the procedure is recommended to be done on an empty stomach;
- abandon physical activity the day before the ECG;
- avo />
Modern medicine makes it easy and painless to examine the work of the heart. For this, in case of malaise or for the purposes of prevention, a person turns to a cardiologist to get directions for analysis.
The ECG is carried out in a specially equipped room in which an electrocardiograph is placed. Modern devices are equipped with a thermal element that replaces a conventional ink system. Using the thermal effect, a cardiogram curve appears on paper.
In the latest cardiographs, the result is not immediately printed on paper, but remains on the monitor screen. With the help of the program, the device itself decrypts the indicators, and also saves data on a disk or flash drive.
The device was first developed by Einthoven in 1903. Since then, the cardiograph has received many changes and improvements, but the principle of operation has remained the same. Equipping the device with a multi-channel device allows you to immediately display the results from several leads.
In 3-channel devices, first, standard leads (I, II, III) are decrypted, then the departments aVL, aVR, aVF coming from the limbs, and at the end of the chest.
An ECG room is usually placed away from electromagnetic fields and X-rays. In the treatment room, the patient lies down on an even couch. Previously, remove clothing to underwear, or open places for attaching electrodes.
The electrodes are made in pear-shaped suction cups. Depending on the number of channels in the cardiograph, the color of the wires may be white or multi-colored.
In multi-channel devices, marking is performed as follows:
- V1-wire red;
- Yellow V2 wire;
- V3-wire green;
- Brown V4 wire;
- V5-wire in black;
- V6 wire is blue.
Before starting the procedure, the doctor should check the quality of the adjacent electrodes to the body. The skin should be clean, without sweat and greasy film. A part of the electrodes is applied at the bottom of the legs and to the feet. For attachment to limbs, suction cups are made in the form of plates. Their goal is to register standard leads.
Each mount has a specific color, which helps to avoid confusion during the study. The red wire is attached to the right wrist, yellow to the left, in the region where the pulse is actively palpated, a green electrode clings to the lower extremity, and black to the right.
When studying a cardiogram, the right leg does not take part in the testimony. Therefore, the electrode is attached to it for grounding.
On the cardiogram, a toothed circuit with cycles is displayed, which is responsible for the state of the heart muscle on impact and during rest. This scheme is called the cardiac cycle; up to 5 cycles are usually observed on each lead. These indications are standard for a regular cardiogram, but in the case of symptoms of myocardial infarction or other heart disease, these cycles may be several times longer.
After printing the cardiogram, the person is freed from the suction cups. The resulting paper is signed and left for analysis. In specific cases, a cardiogram is prescribed after performing physical exercises. To obtain the correct results, readings are taken before and after the load.
Technique of execution
Registration of heart contractions is carried out by a qualified nurse in the office of functional diagnostics. The procedure consists of several stages:
- The patient exposes the lower legs, forearms, chest, wrists and lies on the couch, arms extended along the body and straightening the legs in the knees.
- The skin of the areas of application of the electrodes of the cardiograph is treated with a special gel.
- Cuffs and suction cups with wiring are fixed: red – on the right hand, yellow – on the left hand, green – on the left foot, black – on the right foot, 6 electrodes – on the chest.
- The device turns on, the principle of which is based on reading the rhythm of contractions of the heart muscle and fixing any violations of its work in the form of a graphic image.
If additional ECG removal is necessary, the healthcare provider may ask the patient to hold his breath for 10-15 seconds. The patient’s data (full name and age) indicate the received cardiogram record, its description is carried out by an experienced cardiologist.
Cardiography does not require particularly complex skills, so the average and junior medical staff know how to make a cardiogram of the heart. A device for such manipulation is a cardiograph. It can be stationary and is always in a specially equipped office, which each clinic has, or mobile – for convenient ECG recording at the patient’s bedside.
When conducting an ECG, the patient lies on his back. The points where the electrodes are applied are freed from clothing and wetted with an isotonic sodium chloride solution to improve conductivity. Electrodes in the form of plates cling to the limbs: red – on the right hand, yellow – on the left, green – on the left leg and black on the right.
Six electrodes in the form of suction cups are installed on the chest. They are called the chest leads (V1-V6), and the electrodes from the limbs are considered the main (I, II, III) and strengthened (aVL, aVR, aVF). Each of the leads is responsible for a specific area in the heart. Suspecting pathological processes along the posterior wall of the heart muscle, additional chest leads are used (V7-V9).
It is important that before the scheduled electrocardiography, the patient does not drink alcohol, coffee. When removing, it is undesirable to move and talk, as this leads to a distortion of the survey results.
The cardiogram is recorded as a graph on a special paper or in electronic form. It is important to record at least four cardiac cycles to obtain objective data on the state of the heart. The film is signed with the name, gender (male, female), the date of the study, the age of the patient, since an adult and a child have different values of normal parameters. After that, the recording is passed to the doctor, who decrypts the ECG in detail.
Decryption of the totals
ECG results are considered the basis for the diagnosis of cardiovascular pathologies. When interpreting them, such parameters as systolic (shock) volume of blood, which is pumped in the ventricles and ejected into the main vessels, minute volume of blood circulation, heart rate in 1 minute, are taken into account.
The sequence algorithm for evaluating the functional activity of the heart and consists of:
Studying the rhythm of contractions – assessing the duration of intervals and >
ECG analysis consists of the main indicators, schematically depicted on a graphic tape: elevations or indentations with sharp ends above a straight line – teeth; segments that connect the teeth – segments; distance from tooth to segment – interval
After analyzing the characteristics of the cardiogram, the attending physician has an idea of the clinical picture of cardiac activity, for example, a change in the width of the intervals and the shape of all convex and concave teeth is observed when the cardiac impulse slows down, a mirror-inverted curve of the T wave and a decrease in the ST segment indicate damage to the muscle layer cells hearts.
When interpreting the ECG, heart muscle contractions are assessed when studying the amplitude and direction of their electric fields in 3 standard leads, 3 reinforced (unipolar), 6 leads from the chest area – I, II, III, avR, avL and avF . Based on the results of these elements, they evaluate the electrical axis of the heart, judge the location of the heart and the presence of disturbances in the passage of electrical impulses through the heart muscle (blockade).
|Ventricular Complex QRS||0,06 – 0,1 seconds||Reflects ventricular depolarization|
|Tooth P||0,07 ″ – 0,12 ″||Shows atrial arousal|
|Q wave||0,04 “||Displays the completion of processes that occur in the ventricles.|
|T wave||0,12 ″ – 0,28 ″||It characterizes the processes of recovery of the ventricles after their contraction|
|PQ Interval||0,12 ″ – 0,2 ″||Shows the transit time of the pulses through the atria to the middle layer of the walls of the ventricles|
|Heart rate (heart rate)||60 – 90 bpm||Displays the rhythm of contractions of the heart muscle|
The location and duration of the segments comply with generally accepted standards. Some indicators of the study depend on age:
- the electric axis has an angle from 45 ° to 70 °, in a newborn baby it is deflected to the left, up to 14 years old – it is located vertically;
- heart rate – sinus, in a newborn up to 135 beats / min, in a teenager – 75-85.
What can affect the result of the ECG
The reliability of the data is affected by such indicators:
- improper attachment of the device to the human body, in some cases, wiring may depart in the process of receiving a cardiogram;
- if there are res >Stress and anxiety affect the normal decoding of ECG in adults
Before going to the treatment table, a person should spend 10-15 minutes in a calm environment. It is important that the person does not worry and his pulse is within the established limits.
Pathological disorders of the heart
If the final research data contains changed parameters, this is the reason for a more detailed examination of the patient. There are several types of deviations of the ECG results:
- border – some indicators are slightly inconsistent with the norm;
- low-amplitude (decrease in the amplitude of the teeth in all leads) – characterizes myocardial dystrophy;
- pathological – a violation of cardiac activity requires immediate medical attention.
However, not all altered results should be taken as evidence of serious problems with the functioning of the heart muscle. For example, a reduction in the horizontal distance of teeth and segments, as well as rhythm disturbance, can be recorded after physical and psychoemotional stress. In such cases, the diagnostic procedure is worth repeating.
The photo shows an example of a cardiogram with deviations – ventricular extrasystole
|Heart rhythm disturbance||Bradycardia||Pulse less than 60 beats / min, PQ segmentsgt; 0,12 ″, P wave in N (normal)|
|Tachycardia||Heart rate up to 180 beats / min, P wave upward, QRSgt; 0,12 ″|
|Changing the position of the EOS (electrical axis of the heart)||Blockade of the legs of the bundle of His||The tooth S is greatly overestimated relative to R, the axis is inclined to the right by gt; 90 °|
|Left ventricular hypertrophy – observed with pulmonary edema and heart attack||R and S teeth are very high, the axis is deflected to the left from 40 ° to 90 °|
|Cardiac Conduction Disorders||AV of the I degree (atrioventricular block)||PQ interval duration gt; 0,2 ″, T wave changes with the ventricular complex|
|AB II degree||PQ is constantly increased and completely replaces ORS|
|Complete AV blockade||Change in atrial systole, the same size of the teeth P and R|
|Other pathological changes||Mitral valve prolapse (prolapse)||The T wave has a downward direction, QT segment lengthening and ST depression are observed|
|Inadequate thyroid function – hypothyroidism||Bradycardia, T wave flat, PQ segment elongated, QRS – low|
|Ischemia||Angle T sharp and high|
|Myocardial||ST segment and T wave of dome-shaped, height R increased, Q – shallow|
Cardiogram of the heart: decoding and the main diagnosed diseases
ECG (transcript in adults may indicate a number of pathologies) indicates dangerous diseases that require urgent intervention.
- Tachycardia. A disease characterized by an increase in heart rate, regardless of a person’s condition. The presence of pathology is characterized by a decrease in the distance between intervals, as well as an RS-T shift.
- Angina pectoris. Jumps in the amplitude of the T waves are noticeable on the ECG, and ST factors also fluctuate.
- Arrhythmia – characterized by a violation of the activity of the heart rhythm and the formation of an impulse. In this case, the distance between the gap RR changes and the interval PQ and QT fluctuates.
- Bradycardia During this pathology, the patient slows down the pulse. Using an ECG, a reduced rhythm is established, and significant gaps between the segments are also visible. The amplitude of the teeth becomes uneven.
- Myocardial infarction. In this case, there is no R wave on the cardiogram. The ST segment is located above the isoline, and T-has a negative value.
- Extrasystole. It is characterized by a change in heart rate. On the ECG, deformation is detected in the image of the QRS teeth, and factor P is also absent.
What to do if abnormalities are found
Violation of the duration of the intervals and the height of the waves are also signs of changes in the work of the heart, on the basis of which a number of congenital and acquired pathologies can be diagnosed.
|ECG indicators||Possible pathologies|
|Peaked, exceeds 2,5 mV||Congenital malformation, coronary heart disease, congestive heart failure|
|Negative in lead I||Septal defects, pulmonary stenosis|
|Deep negative in V1||Heart failure, myocardial infarction, mitral, aortic defect|
|Less than 0,12 s||Hypertension, vasoconstriction|
|More than 0,2 s||Atrioventricular block, pericarditis, heart attack|
|In lead I and aVL, low R and deep S, as well as a small Q in the holes. II, III, aVF||Hypertrophy of the right ventricle, lateral myocardial infarction, vertical position of the heart|
|Late R in the hole. V1-V2, deep S in holes I, V5-V6, negative T||Coronary disease, Lenegra disease|
|Wide serrated R in holes I, V5-V6, deep S in holes V1-V2, lack of Q in holes I, V5-V6||Left ventricular hypertrophy, myocardial infarction|
|Voltage below normal||Pericarditis, impaired protein metabolism, hypothyroidism|
The classical technique simply captures the impulses that the heart muscle transmits. Equipment has no negative impact on the human body. That is why it is possible to control the activity of the heart with the help of electrocardiography for both children and adults. Some caution is observed only when prescribing a stress ECG. The shelf life of the survey results is 30 days.
Thanks to this safe technique, it is possible to detect serious cardiovascular pathologies in a timely manner and monitor the success of treatment measures. In state medical institutions, the ECG is free, for its implementation, the patient needs to get a referral from the attending physician. In private clinical diagnostic centers, the examination is paid – its cost depends on the method of procedure and the level of qualification of specialists.
Not always the first cardiogram received reflects the true picture of the patient’s heart condition. That is why, after receiving the results, it is recommended to pass the second test. Some heart diseases are not detected during a routine examination and require more accurate tests.
After receiving poor results, some subtleties should be reviewed:
- The time of day when the ECG was performed. According to the rules, the procedure is carried out in the morning, on an empty stomach.
- Emotional condition. If a person is stressed or worried, the doctor should know about it so that the ECG results do not change for the worse.
- It should be remembered whether there was a meal before the first ECG. This harmless factor can greatly affect indications, especially if the patient has consumed alcohol, fatty foods or coffee.
- In some cases, electrodes may be released during the procedure, which dramatically affects the interpretation.
Heart rhythm problems can be present in the lives of healthy people, which is the norm. Therefore, when receiving negative results, one should not immediately despair, since the heart is a sensitive organ and its study takes a lot of time.
Given these factors, you should review the procedure. In any case, if there are complaints or symptoms, the patient is sent for a second ECG. Deciphering ECG indicators in adults is a complex and painstaking task. A specialist needs the correct concept of all angles and components. It should be remembered that different values can influence the readings and results.