Interval N

The H interval (from the Latin “intervallum” - interval) is a segment of the intracavitary electrogram of the heart (ECHS), reflecting the time of passage of excitation from the atria to the ventricles. This interval may change with various disorders of intraventricular conduction, such as blockades, arrhythmias and others.

The H interval is measured in milliseconds (ms) and is one of the key parameters in diagnosing intraventricular conduction disorders of the heart. It can be used to determine the severity of the disease, as well as to select the optimal treatment tactics.

During normal heart function, the H interval is about 120-200 ms. However, with conduction disorders, the interval may increase or decrease. For example, with blockade of the right bundle branch, the H interval can be increased to 300-400 ms, which indicates a slowdown in impulse conduction.

To measure the H interval, special equipment is used - an electrocardiograph. The measurement results can be used to diagnose and treat various heart diseases, such as arrhythmias, blockades and others.

Interval H: Intraventricular conduction indicator

The intracavitary cardiac electrogram is an important tool for assessing the electrical activity of the heart muscle. It allows you to identify various anomalies and disturbances in conductivity that may be associated with cardiovascular diseases. One of the key components of the electrogram is the H interval.

The H interval is a segment that reflects the time of excitation from the atrioventricular bundle to the myocardium of the right ventricle. This interval is an important indicator of intraventricular conduction and can change with many disorders of this process.

The normal H interval is usually between 35 and 45 milliseconds. However, with certain heart pathologies, such as blockades and arrhythmias, the H interval can be lengthened or shortened. This is due to changes in the conduction of electrical impulses within the heart.

Prolongation of the H interval may indicate conduction disorders in the heart's tract system, such as right or left bundle branch block or other forms of block. This can lead to improper synchronization of contractions of the heart chambers and a decrease in cardiac efficiency.

On the other hand, a shortening of the H interval may be associated with an acceleration of the conduction of excitation inside the heart. This may occur with rhythm disturbances such as atrial or ventricular tachycardia. Rapid conduction of an electrical impulse can cause cardiac arrhythmias and worsen the patient's general condition.

Changes in the H interval can be detected during an electrocardiographic study (ECG). This is a non-invasive and safe method that allows you to evaluate the electrical activity of the heart. Doctors use ECG data, including the H interval, to diagnose and treat heart abnormalities.

In conclusion, the H interval is an important component of the intracavitary cardiac electrogram. It reflects the conduction time of excitation from the atrioventricular bundle to the myocardium of the right ventricle and can change with various disorders of intraventricular conduction. Assessing the H interval is an important step in diagnosing and treating cardiovascular disease, and changes in it can provide doctors with valuable information about a patient's heart condition.