What is Holter?
Dynamic electrocardiogram can continuously record and analyze the changes of electrocardiogram of the heart in resting and active states for a long time. It is also called holter monitoring. Through 7 electrodes on the chest, the subject can monitor the subjects' resting, active, and resting conditions within 24 hours. The ECG waveforms at different times and in different states, such as standing, lying, and sitting, are continuously recorded in the instrument. The data stored in the recorder are then input into the computer, and conclusions are drawn after comprehensive analysis.
Why perform Holter monitoring?
Statistics show that about 544,000 people die from sudden cardiac death in China every year. Sudden death is an extremely dangerous cardiovascular disease. When the patient's condition is basically stable, he or she suddenly develops severe arrhythmia, leading to rapid death. A one-time ECG cannot effectively capture accurate data for diagnosis, while a dynamic ECG can provide continuous data for up to 24 hours.
To put it simply, it only takes ten seconds to perform an electrocardiogram. In this way, only a dozen heartbeats can be recorded. If arrhythmia does not appear during these ten seconds, it will not be captured. But does that mean there is no problem? Therefore, the first use of Holter is to detect various cardiac arrhythmias.
The characteristic of dynamic electrocardiogram is that it can record the patient's electrocardiogram within 24 hours. It has many advantages compared with ordinary electrocardiogram. Ordinary electrocardiogram only uses electrodes to record a section of the patient's electrocardiogram waveform in a very short period of time, generally two or three minutes. However, some patients' electrocardiogram waveforms are not only abnormal at certain moments, so if such patients are asked to do ordinary electrocardiograms, no problems will be found. Only dynamic electrocardiograms can detect such hidden and deep physical defects, so dynamic electrocardiograms It is a more reliable method to identify heart problems.
What problems can a dynamic electrocardiogram detect?
Dynamic electrocardiogram has a wide range of uses. It is mainly used to capture paroxysmal arrhythmias. If there are paroxysmal arrhythmias and premature contractions, their occurrence time, number and distribution status can be recorded, as well as whether there is transient angina pectoris, myocardial infarction, etc. Ischemia, the triggers and occurrence time of the attack, and the functional evaluation of the pacemaker can also be used for differential diagnosis of some patients who often have symptoms of cardiovascular disease but have no positive findings on ordinary electrocardiograms.
What should you pay attention to when doing a dynamic electrocardiogram?
After wearing the recorder, you should have normal eating and daily activities as before wearing it. Poor contact or falling off of the electrodes will affect the results, so do not take a shower on the day of the examination to avoid sweating. Record daily activities to aid Holter analysis.
What do the results of a dynamic electrocardiogram include?
Including summary of heart rhythm, heart rate, arrhythmias including ventricular and supraventricular arrhythmias, STT segment analysis, and heart rate variability analysis.
What should be the slowest heart rate, fastest heart rate, total heart rate, and average heart rate?
Slowest heart rate: During night sleep, the slowest heart rate can be as low as 40 beats/min, and occasionally lower than 40 beats/min, mostly due to increased vagal tone. Fastest heart rate: The heart rate of young people during strenuous exercise can reach more than 180 beats/min, while the heart rate of elderly people during strenuous exercise generally does not exceed 160 beats/min. Average heart rate: Resting heart rate is mostly between 60-100 beats/minute.
How does ECG monitoring evaluate coronary artery disease?
