Archives

Located above the ventricle – includes the bundle of His, AV node, atria and the SA node. 1. Six Second ECG Guidebook (2012), T Barill, Read More

If the QRS is narrow, the rhythm originates from a supraventricular site. Otherwise, if the QRS is wide, chances are, the rhythm is a ventricular Read More

Paroxysmal Supraventricular Tachycardia (PSVT): Broad category for rapid rhythms originating outside of the ventricles that occur suddenly; rapid supraventricular rhythms include sinus tachycardia, junctional tachycardia, Read More

Heart rate and contractility are influenced by sympathetic innervation of the heart. Sympathetic innervation which releases epinephrine and norepinephrine, influences cardiac output through its alpha Read More

The involuntary nervous system that provides alpha, Beta 1 and Beta 2 responses as stimulated by catecholamines – epinephrine, norepinephrine and dopamine; combined responses include Read More

Ischemia and sympathetic stimulation can enhance a ventricle’s automaticity, stimulating the ventricle to initiate an impulse before a sinus initiated wave reaches the ventricles. This Read More

The synchronous pacing of the heart by an artificial pacemaker; the pacemaker fires only if the heart does not initiate an intrinsic impulse within a Read More

A symptom of lightheadedness or dizziness. 1. Six Second ECG Guidebook (2012), T Barill, p. 206 Read More

Equipped with a carefully formed clinical impression of the patient, a systematic approach to 12 lead ECG interpretation makes the 12 lead ECG a reliable Read More

A contraction phase of the cardiac cycle; systole takes about 1/3 of the time of the cardiac cycle (2/3 of the time is taken by Read More