ECG(Electrocardiogram)

Presented By

Syed Nazmus SakibDept. of Applied Physics, Electronics & Communication Engineering

University of Chittagong3rd Year, 6th Semester

ID: 13702008Session: 2012-2013

CONTENTS

S - WaveS-T Segment

T - Wave

Q - WaveR - Wave

P-Q SegmentP - Wave

ECG Wave What is ECG?

What is ECG?

The Electrocardiogram (ECG or EKG)

is a diagnostic tool that is routinely

used to assess the electrical and

muscular functions of the heart.

The electrocardiogram can measure

the rate and rhythm of the heartbeat,

as well as provide indirect evidence of

blood flow to the heart muscle.Back to Contents

ECG Wave

Each wave or segment of an ECG represents a certain event in the Cardiac Cycle.The segments are:• P wave• P-Q segment• QRS complex• S-T segment• T-wave

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P - Wave

When the Atria is full of blood the SA node (Sinoatrial Node) fires and electrical impulses spread throughout the Atria and cause them to depolarize. This is represented by the P-wave on the ECG.

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P-Q Segment

The P-Q segment represents the time required for the signal to travel from SA node (Sinoatrial node) to AV node (Atrioventricular node).

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Q - Wave

Q-wave corresponds to the depolarization of the inter ventricular section.

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R - Wave

R-wave is produced by depolarization of the main mass of the ventricles.

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S - Wave?S-wave represents the last phase of the ventricular depolarization at the base of the heart.

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S-T Segment

When the ventricles contract & pump blood, we have the S-T segment on the ECG wave.

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T - Wave

The T-wave represents the ventricular repolarization immediately before ventricular relaxation

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Thus the cycle repeats itself with every heartbeat.

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End of Presentation