Heart Rhythm

Heart Rhythm is the coordinated sequence of cardiac muscle contractions regulated by the electrical conduction system of the heart. The heart rhythm is essential for maintaining effective blood circulation throughout the body.

Overview

The heart rhythm is initiated by the sinoatrial node (SA node), often referred to as the heart's natural pacemaker. The electrical impulses generated by the SA node spread through the walls of the atria, causing them to contract and pump blood into the ventricles. The impulses then reach the atrioventricular node (AV node), which acts as a gatekeeper, delaying the signal before it passes into the ventricles. This delay allows the ventricles to fill with blood before they contract.

Disorders of Heart Rhythm

Disorders of heart rhythm, known as arrhythmias, can occur when the heart's electrical system doesn't work properly, causing the heart to beat too fast, too slow, or irregularly. These can include conditions such as atrial fibrillation, ventricular tachycardia, and bradycardia. Treatment for arrhythmias can involve medication, lifestyle changes, or procedures such as cardioversion or catheter ablation.

Diagnosis and Treatment

Diagnosis of heart rhythm disorders typically involves tests such as an electrocardiogram (ECG), Holter monitor, or event monitor. Treatment options depend on the type and severity of the arrhythmia and may include medications, pacemaker implantation, or defibrillator implantation.

See Also

• Cardiology
• Electrophysiology
• Cardiac cycle
• Heart disease

References

Heart Rhythm Resources
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