Search results
The sinoatrial node (SA node) is the primary pacemaker of the heart. It is a region of cardiac muscle on the wall of the upper right atrium near to the superior vena cava entrance. The cells that make up the SA node are specialized cardiomyocytes known as pacemaker cells that can spontaneously generate cardiac action potentials.
- Sinus Pause and Arrest
- SA Nodal Exit Block
- Abnormal Sinus Rhythms
- Wandering Atrial Pacemaker
This condition happens when the SA node does not initiate the electrical impulse that leads to a heart contraction. A pause or arrest can last a few seconds to several minutes. A pause of a few seconds does not always produce symptoms. A longer pause can result in: 1. dizziness 2. lightheadedness 3. fainting In some cases, this condition can even b...
An SA nodal exit block happens when the SA node initiates the electrical impulse, but the impulse does not reach the neighboring tissue in the right atrium. Therefore, the heart does not receive the signal to contract. This causes a pause in the heartbeat.
Abnormal sinus rhythms are small variations in heart rhythms. They occur more frequently in younger people or those who use morphineor a drug called digoxin. If a person uses digoxin, abnormal sinus rhythm may result from digoxin toxicityTrusted Sourceand require treatment. People in this situation should contact a healthcare professional as soon a...
A wandering atrial pacemaker describes a situation where the pacemaker function of the heart comes from different locations in the right atrium rather than the SA node. This condition is usually asymptomatic and typically does not require treatment.
Don't know? Terms in this set (41) which circuit carries blood from the right ventricle to the lungs for gas exchange and returns it to the left atrium of the heart? pulmonary. which of the following superficially separates the atria from the ventricles?
Jul 8, 2023 · A pacemaker is a device used to control an irregular heart rhythm. A pacemaker has flexible wires called leads. The wires are placed in one or more chambers of the heart. They deliver electrical signals to fix the heart rate. Some newer pacemakers don't need wires.
Study with Quizlet and memorize flashcards containing terms like What part of the heart's conduction system acts as the primary pacemaker?, Having no nucleus, a biconcave shape, and the function of gas transport would describe a, Transportation functions of the circulatory system include and more.
A cardiac pacemaker is a small device implanted in a person’s chest that provides an electrical pulse to the heart, as needed, to regulate a slow heart rate. As people age, some may experience a slower-than-normal heart rate caused by electrical problems or blockages within the heart.
People also ask
How does a pacemaker work?
What is a pacemaker used for?
Where is a pacemaker placed?
What is the heart's natural pacemaker?
How many parts does a pacemaker have?
Oct 29, 2024 · A pacemaker is a small, battery-operated device that helps the heart beat in a regular rhythm. Traditional pacemakers have three parts: a generator, wires (leads) and sensors (electrodes). Some newer pacemakers are wireless. It produces electrical impulses to help control abnormal heartbeats.
