Exam 4: Errors of Automaticity

When the sinus rhythm exceeds 100 beats per minute, it is called a ____.

____ is the result of an enhanced automaticity in the atrium, usually near the pulmonary veins proximal to the atrial septum, that creates very fast heart rates.

____________________'s phenomenon occurs because the ventricles are not completely repolarized, thus allowing one branch of the bundle branches to be depolarized.

The relationship of the premature complex to the preceding complex is called its ____.

____ is a common ECG dysrhythmia affecting some two million Americans, a far greater percentage than any other dysrhythmia.

Accelerated idioventricular rhythm is seldom seen in successful cardiac resuscitations.

Dysrhythmia that is a rhythm with a rapid rate is called a(n) ____.

The signs and symptoms of atrial fibrillation revolve around the subtle loss of ____.

____________________ is a rare dysrhythmia thought to be due to increased automaticity of an ectopic focus, probably outside of the AV node and near the bundle of His.

In accelerated junctional rhythm, junctional tissue initiates impulses at a rate greater than its intrinsic rate of ____ to ____.

A ____ is a beat initiated in ectopic atrial tissue that occurs before an expected complex.

____ is where the fastest pacemaker assumes control of the rate of depolarization of the atrium and ventricles.

Dysrhythmia that is a rhythm with a slower rate is called a(n) ____.

Dysrhythmia can alter the hemodynamics of the heart and may lead to a significant decline in cerebral blood flow, even in otherwise healthy individuals.

A(n) ____________________ is an irregular cardiac rhythm, occurs whenever the rhythm is not a sinus rhythm.