Chest discomfort – usually pressure or tightness – that results from a relative poor oxygen supply to cardiac tissue (ischemia). 1. Six Second ECG Guidebook

The left bundle branch splits into the septal, anterior and posterior fascicles. Normal ventricular depolarization begins with the septal fascicle of the left bundle branch

Poor R wave progression (i.e. not until leads V5 or V6) may signal an anterior infarction. In line with QRS axis deviation, abnormal R wave

Forward conduction of the electrical impulse across the atria & ventricles; the expected route of electrical conduction from top to bottom. 1. Six Second ECG

As a general rule, a patient experiencing a left ventricular infarction – anterior, lateral or anterolateral MI – should be managed with particular attention to

When combined with congruent clinical findings, a diagnosis of an anteroseptal myocardial infarction (MI) is strongly supported. Since the anteroseptal region of the heart involves

Begins with the aortic valve, the largest main vessel that carries oxygenated blood from the ventricles to the body. 1. Six Second ECG Guidebook (2012),

The left ventricle ejects blood into the aortic arch to the body. Within the arch, the coronary arteries branch off first followed by three main

The bottom of the heart (inferior aspect) located usually around the 5th intercostal space. The heart is a wondrous organ about the size of your

Technically the absence of rhythm, arrhythmia is commonly used interchangeably with the term dysrhythmia. 1. Six Second ECG Guidebook (2012), T Barill, p. 190

Main vessels carrying blood from the heart; the arteries have minimal elasticity and contain approximately 20% of the blood supply. 1. Six Second ECG Guidebook

Electrocardiograms typically measure electrical activity across the heart. Occasionally additional electrical activity can show up on an ECG. This includes electrical activity of other muscles

With premature beats, the His-Purkinje fibers may not completely repolarize before the next wave arrives. The ion channels may not yet be fully operational. The

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

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