What is an Idioventricular heart rhythm?

As a medical professional with a background in cardiology, I can provide you with an explanation of an Idioventricular rhythm. An Idioventricular rhythm, also known as an A-V nodal rhythm, is a type of abnormal heart rhythm that originates below the atria and atrioventricular (A-V) node in the ventricles. This rhythm occurs when the electrical impulses that normally regulate the heartbeat are disrupted, and the ventricles begin to contract independently of the atria. The ventricles, which are the lower chambers of the heart, take over the role of initiating the heartbeat. Idioventricular rhythms are typically slower than normal sinus rhythms and can range from 40 to 120 beats per minute. They are often seen in the context of coronary artery disease, heart attacks, or as a result of certain medications or electrolyte imbalances. In some cases, this rhythm can be a sign of a more serious underlying condition. While an Idioventricular rhythm is generally considered a compensatory mechanism by the heart to maintain some level of cardiac output when the normal pacemaker function is impaired, it is not as efficient as a normal sinus rhythm. This can lead to decreased cardiac output and, in severe cases, symptoms such as fatigue, shortness of breath, or even shock. Treatment for an Idioventricular rhythm depends on the underlying cause and the patient's symptoms. In some cases, no treatment is necessary if the rhythm is well-tolerated and there are no concerning symptoms. However, if the rhythm is causing significant symptoms or is due to a serious heart condition, treatment may include medications, lifestyle changes, or procedures like a pacemaker implantation.

This is called Idioventricular Rhythm. Ventricular signals are transmitted cell-to-cell between cardiomyocytes and not by the conduction system, creating wide sometimes bizarre QRS complexes(> 0.12 sec). The rate is usually 20-40 bpm. If the rate is >40 bpm, it is called accelerated idioventricular rhythm.