Intersystolic interval

The intersystolic interval is the period of time that passes between the end of systole (contraction) of the atria and the beginning of systole (contraction) of the ventricles. Normally, in an adult, this interval is about 0.04 seconds.

The intersystolic interval is a very important parameter that determines the work of the heart and its ability to pump blood. It also plays an important role in maintaining heart rhythm and preventing arrhythmias.

Normally, the intersystolic interval is determined by many factors, including heart rate, filling of the ventricles with blood, electrical activity of the heart, and others. If this interval is too short or too long, it can lead to various heart diseases such as arrhythmias, heart failure and others.

An electrocardiogram (ECG) is used to measure the intervals between heartbeats. An ECG consists of a series of waves that reflect the electrical activity of the heart, and allows you to determine heart rate and other parameters.

Based on the ECG results, doctors can determine whether the intersystolic interval is normal or not. If it is too short or long, it may indicate a heart problem such as arrhythmia or heart failure.

Thus, the intersystolic interval plays an important role in the functioning of the heart and can be used to diagnose various diseases associated with the functioning of the heart.

The intersystolic interval is the length of time between contractions of the left and right ventricles of the heart, which takes about ¼ of the entire cardiac cycle and is about 0.8 s. It is considered one of the most important indicators of heart function. It reflects its pumping function, ensuring the saturation of the blood with oxygen and the removal of carbon dioxide. An interrupted rhythm or insufficient contraction of the myocardium (ischemia) leads to stagnation in both the pulmonary and systemic circulation. Any changes in the extracellular space of the heart muscle (depolarization of the walls, changes in excitability in heart failure or metabolic disorders) are reflected in the QT value. Therefore, diagnostic measures include computed magnetic resonance imaging and electrocardiogram, often with the use of pharmacological drugs. Only after conducting the entire complex of studies is the significance of the changes determined. Due to its multifaceted significance for the body, the interventricular interval cannot have any