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EKG Basics

A part of the presentation;

Outline:
Review of the conduction system
EKG waveforms and intervals
EKG leads
Determining heart rate
Determining QRS axis

The Normal Conduction System:

What is an EKG?

The electrocardiogram (EKG) is a representation of the electrical events of the cardiac cycle.

Each event has a distinctive waveform, the study of which can lead to greater insight into a patient’s cardiac pathophysiology.

What types of pathology can we identify and study from EKGs?
Arrhythmias
Myocardial ischemia and infarction
Pericarditis
Chamber hypertrophy
Electrolyte disturbances (i.e. hyperkalemia, hypokalemia)
Drug toxicity (i.e. digoxin and drugs which prolong the QT interval)

EKG Leads
Leads are electrodes which measure the difference in electrical potential between either:

1. Two different points on the body (bipolar leads)

2. One point on the body and a virtual reference point with zero electrical potential, located in the center of the heart (unipolar leads)

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Author: Unknown

Tags: Rule of 300 , 10 Second Rule , The QRS Axis , The Equiphasic Approach

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