Archives

Pacemaker (non-demand mode) fires irrespective of the person’s intrinsic firing; note that the risk for R-on-T phenomena and resulting ventricular tachycardia/fibrillation is higher than synchronous Read More

Absence of electrical activity demonstrated by a straight ECG line. Most students of dysrhythmia courses arrive with the claim that they are at least skilled Read More

Right and left atria (1/3 volume and muscle mass of the ventricles) pump blood to the ventricles. 1. Six Second ECG Guidebook (2012), T Barill, Read More

Once the SA node initiates an electrical impulse, the resulting electrical wave moves across the right and left atria. The atrial septum serves as an Read More

Atrial enlargement and dilation can be caused by tricuspid and bicuspid (mitral) valve disease, hypertension, and ventricular hypertrophy among other causes. A P wave can Read More

One of the most common dysrhythmias, the atria have a host of sites that are concurrently firing at a combined rate of 350-600/minute; since the Read More

A rapid atrial rhythm (approximately 300/minute in the atria) caused by a re-entry loop within the atria; since the junction is unable to conduct 300 Read More

The contraction of the atria prior to ventricular contraction causes an increased volume and stretch to the ventricles – resulting in increased force of contraction Read More

One of the hormones released by the endocardium is atrial natriuretic factor (ANF); which is released by the atria to oppose the activity of epinephrine, Read More

An implanted cardiac pacemaker with a sensor lead in the right atrium and a second pacing lead in the right ventricle, senses atrial activity, allows Read More