What is the heart’s natural pacemaker? - Medical News Today
2022年8月31日 · The sinoatrial (SA) node is the natural pacemaker of the heart. It generates electrical impulses that cause the heart’s chambers to contract, setting the heart rate. The SA node typically...
Cardiac pacemaker - Wikipedia
The cardiac pacemaker is the heart 's natural rhythm generator. It employs pacemaker cells that produce electrical impulses, known as cardiac action potentials, which control the rate of contraction of the cardiac muscle, that is, the heart rate.
Heart Conduction: What Is It & How It Works - Cleveland Clinic
2021年7月23日 · Your sinoatrial node is sometimes called your heart’s natural pacemaker. It sends the electrical impulses that start the heartbeat. The SA node is in the upper part of your heart’s right atrium.
Pacemaker - Mayo Clinic
2023年7月8日 · A pacemaker is a small, battery-powered device that prevents the heart from beating too slowly. You need surgery to get a pacemaker. The device is placed under the skin near the collarbone.
Pacemaker - American Heart Association
2024年10月29日 · The sinus node is the heart’s natural pacemaker. It’s a small mass of specialized cells in the top of the right atrium (upper chamber of the heart). It produces the electrical impulses that cause your heart to beat.
The Heart's Electrical System: Anatomy and Function - Verywell …
2023年3月12日 · It causes the cells of the heart muscle to contract in the correct sequence, and ensures regular, efficient, and coordinated heartbeats. For this reason, the sinus node is often referred to as the heart's "natural pacemaker."
Pacemaker: Types, Procedure, Precautions, and More - Healthline
2021年11月25日 · The SA node is your heart’s natural pacemaker. Electrical signals generated by the SA node travel from the top of the heart to the bottom in a synchronized fashion, leading to a heartbeat.
Conduction System - The Texas Heart Institute
Conduction System. Electrical impulses from your heart muscle (the myocardium) cause your heart to beat (contract). This electrical signal begins in the sinoatrial (SA) node, located at the top of the right atrium. The SA node is sometimes called the heart’s “natural pacemaker.”
Cardiac Pacemaker > Fact Sheets - Yale Medicine
This “natural pacemaker” sends electrical signals through the heart that make its upper chambers contract, pushing blood through to its lower chambers and keeping the heart beating at a normal rhythm. Sometimes, however, the sinus node stops working efficiently.
Why would I need one? Your doctor may recommend a pacemaker because your heart’s natural pacemaker isn’t working properly. A pacemaker regulates your heart and rhythm. Problems that may have changed your heart rhythm include: • Heartbeat that’s too …