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The involuntary nervous system that invokes a cholinergic response; for the heart, the Vagus nerve stimulates the SA node and the AV node, slowing the Read More

Atrial tachycardia with a witnessed sudden onset; rhythm is regular with a rate of 150-240/minute. 1. Six Second ECG Guidebook (2012), T Barill, p. 201 Read More

Broad category for rapid rhythms originating outside of the ventricles that occur suddenly; rapid supraventricular rhythms include sinus tachycardia, junctional tachycardia, atrial tachycardia, atrial fibrillation Read More

Q waves are a normal phenomenon when they are narrow (less than 1 mm in width) and shallow (less than 25% the height of the Read More

Pattern refers to the repeating components of an ECG rhythm in a predicative order. An ECG rhythm that is initiated by one of several intrinsic Read More

The presence of ST elevation in most views of a 12 lead ECG suggests pericarditis. Pericarditis, an inflammation to the pericardial lining of the heart Read More

The sac that surrounds the heart (composed of the visceral and parietal layers); the pericardium is filled with approximately 30-50 ml. of surfactant fluid – Read More

Refers to waves that change in shape – usually refers to QRS complexes that have more than one impulse site. 1. Six Second ECG Guidebook Read More

Normal ventricular depolarization begins with the septal fascicle of the left bundle branch (causing a Q wave) followed by a simultaneous depolarization of the remaining Read More

Posterior views of the heart can be best seen via posterior leads placed below the scapula to the left of the spine. The inferior leads Read More