Atrioventricular Block

Atrioventricular (AV) block occurs when atrial depolarizations fail to reach the ventricles or when atrial depolarization is conducted with a delay. Three degrees of AV block are recognized. read more

Atrioventricular Dissociation

Atrioventricular (AV) dissociation is a condition in which the atria and ventricles do not activate in a synchronous fashion but beat independent of each other. AV dissociation usually refers to the situation in which the ventricular rate is the same or faster than the atrial rate. read more

Wide Complex Tachycardias: Demystifying the Differential Diagnosis

A 20-year-old male presents to the Emergency Department with complaints of a sudden onset of palpitations. He states he was studying for his final exams when he had palpitations associated with mild chest discomfort and shortness of breath. He drank two glasses of water without relief and finally called 911. read more

Older persons with diabetes receive fewer inappropriate ICD shocks: results from the INTRINSIC RV trial.

In patients with heart disease, diabetes and age predict adverse outcomes. It remains unclear whether persons with diabetes who have implantable cardioverter defibrillators (ICDs) have fewer appropriate and inappropriate ICD shocks. read more