Infarction

The necrosis of tissue; acute myocardial infarction involves the acute death of myocardial cells. 1. Six Second ECG Guidebook (2012), T Barill, p. 198 Read More

Inferior Leads

The inferior leads show the inferior aspects of the heart – the inferior aspects of the right ventricle and the left ventricle. Much of the Read More

Inotropic

Refers to the contractility of the heart (often produced from sympathetic nervous system stimulation; note that a stimuli that leads to increased contractility is called Read More

International Electrotechnical Commission (IEC)

Two coloring schemes exist for electrode placement, originating from two standards bodies: the American Heart Association (AHA) and the International Electrotechnical Commission (IEC). The coloring Read More

Interpolated 6 Lead System

In an effort to reap the advantages of 12 lead views while keeping the monitoring system practical, reduced-lead set technologies have been developed using five Read More

Interpolated PVC

A PVC that occurs when the next expected QRS complex is to occur; the rhythm pattern is not interrupted. 1. Six Second ECG Guidebook (2012), Read More

Interval

A period measured on rhythm strip paper that measures a wave and a segment; the distance measured is equal to time taken as an ECG Read More

Intraventricular Conduction Delay

Occasionally, the QRS complex meets only one of the criteria (i.e. wide but not notched or notched but not wide). If not a hemiblock, this Read More

Intrinsic

Characteristic or property natural to the heart and its structures. 1. Six Second ECG Guidebook (2012), T Barill, p. 198 Read More