2024年10月8日 · Sinus rhythm with PVCs of two different morphologies (arrows) Note the appropriately discordant ST segments / T waves; The pause surrounding the PVC is equal to double the preceding R-R interval (= a full compensatory pause)

PVC’s may be unifocal (from one spot on the ventricle wall) or they may be multifocal (from two or more different spots [foci] on the ventricle wall). Obviously, the multifocal PVC is the more dangerous condition; it indicates the general irritability of the myocardium and the possibility of even more dangerous heart arrhythmias.

2023年10月16日 · The PVCs are an interruption in the underlying rhythm which is sinus in origin above. And so, we would describe the underlying rhythm first (i.e. sinus rhythm/bradycardia, etc.) followed by the PVC grouping or pattern present (i.e. sinus rhythm with PVCs in bigeminy; or sinus rhythm with a ventricular couplet if couplets were present).

This encounter shows a normal sinus rhythm with a large amount of premature ventricular contractions (PVCs), evolving into a phenomenon known as bigeminy. This is when a pattern of one normal beat followed by one ectopic beat develops.

This is a nice example of sinus rhythm with ventricular bigeminy in a patient with intermittent chest pain and hypertension. The underlying rhythm is most likely normal sinus rhythm, but every other sinus P wave is most likely hidden in the PVCs, and not conducted due to the refractory state of the ventricles after the PVCs.

Full Compensatory Pause and Ventricular Extrasystole. Incomplete Compensatory Pause and Ventricular Extrasystole. Where is the ectopic focus? How many ectopic foci are there? When does VES occur (in which phase of the cardiac cycle)? Do the VES repeat? Interpolated Ventricular Extrasystole. 1. First, assess the chest leads. 2.

2023年8月8日 · If the PVCs continuously alternate with a regular sinus beat, the patient is in bigeminy. Likewise, if every third heartbeat is a PVC, then it is named trigeminy. PVCs present as heart palpitations in most patients.

2024年2月3日 · PVCs and bigeminy may be a sign that all is not well with the heart and the patient is at risk of a ventricular fibrillation (VF) when they occur in the setting of acute myocardial ischaemia, hypoxia, prolonged QTc, drug overdoses or …

2016年11月14日 · The ectopic beat is typically a premature ventricular contraction (PVC). For example, in ventricular bigeminy, a sinus beat is shortly followed by a PVC, a pause, another normal beat, and then another PVC. In atrial bigeminy, the other "twin" is a premature atrial contraction (PAC).

Bigeminy is a cardiac arrhythmia in which there is a single ectopic beat, or irregular heartbeat, following each regular heartbeat. Most often this is due to ectopic beats occurring so frequently that there is one after each sinus beat, or normal heartbeat. The two beats are figuratively similar to two twins (hence bi-+ gemini).