An Introduction

Heart disease is the biggest cause of adult death in the western world.

Cardiology is the branch of medicine that deals with the heart, particularly its structure and function, and the diagnosis and treatment of heart disease.

The following pages explain how the heart works, diseases and symptoms, heart rhythm abnormalities, and the use of the electrocardiogram.

The Heart
This section contains detailed information on the structure, blood flow, and electrical conduction system of the heart.
Symptoms of Heart Disease
This section contains a review of symptoms that may indicate the presence of heart disease.
Diagnosing Heart Disease
This section describes the various tests that doctors and cardiologists use to identify and monitor heart disease.
Introduction to the ECG
This section presents an introduction to understanding the electrocardiogram, looking at the different waveforms and durations of the heartbeat.
Rhythms and Arrhythmia
This section explains how to recognise and interpret the more common rhythm abnormalities seen on the ECG.