SUDDEN death in persons with artificial pacemakers is a continuing and disturbing problem. Causes include pacemaker-catheter displacement, electric-component failure, broken wires and rising pacing ...

Serious ventricular arrhythmias due to carotid-sinus massage are extremely uncommon. Meredith and Beckwith 8 recorded 2 cases of transient ventricular tachycardia that followed its use. The first well ...

Background and objective Prior studies have suggested that patients with premature ventricular complexes (PVCs) may have an increased risk for atrial fibrillation (AF) and stroke. It is unclear ...

Although premature ventricular beats (PVBs) in young people and athletes are usually benign, they may rarely mark underlying heart disease and risk of sudden cardiac death during sport. This review ...

Ventricular fibrillation is a cardiac arrhythmia in which the muscle in the lower chambers of the heart (the ventricles) contracts irregularly and rapidly. The ventricles quiver and are unable to ...

This ECG shows ventricular fibrillation. Disorganized wide QRS complexes of relatively low amiplitude are present at a rate of greater than 300 beats per minute. Note the sharp spikes intermittently ...

Without treatment, some arrhythmias can lead to life threatening complications, such as heart failure, cardiac arrest, or a stroke. Arrhythmia is the term used to describe an irregular or abnormal ...

Pulseless ventricular tachycardia occurs when an abnormally rapid heart rate originating in the heart’s lower chambers makes a pulse undetectable. Emergency cardiac defibrillation is usually necessary ...