What is the pacemaker of the heart? What happens to the blood when the heart contracts and relaxes? Explain the condition of heart arrhythmia. What is meant by the following terms: A. mitral valve prolapse B. calcific aortic stenosis C. ventricular fibrillation ...
An implantable pacemaker, also known as an artificial pacemaker, is an internal medical device that regulates the beating of the heart to a sufficient rate that meets the body's needs. This type of pacemaker is used in patients whose heart rate is too fast, a condition called tachycardia; wh...
What is the purpose of the heart valves? What is the function of valves in veins? What is the purpose of the tricuspid valve? What are the valves of the venous system? What is their function? Why is it more important for leg veins to have valves than it is for neck veins to ...
The sinoatrial (SA) nodes are areas of the heart's atrium that act as the heart's pacemaker. Impulses from the SA node cause the heart’s chambers to contract. Purkinje fibers receive their impulses from the SA node and move the impulse through the heart’s muscles. Just below the atrium...
Pacemaker cells generate an electrical impulse approximately 70 times per minute when the heart is at rest and up to 160 times each minute during vigorous exercise. All of the heart’s cells are capable of acting as a pacemaker cell. The cells located in the sinoatrial node, however, are ...
"It's kind of like a pacemaker for the heart, but instead, we use it for the brain," says Dr. Richard Zimmerman, a Mayo Clinic neurosurgeon. Dr. Zimmerman is talking about a device called a responsive neurostimulator, or RNS therapy. It's implanted in a patient's skull with electrodes...
Pacemaker cells generate an electrical impulse approximately 70 times per minute when the heart is at rest and up to 160 times each minute during vigorous exercise. All of the heart’s cells are capable of acting as a pacemaker cell. The cells located in the sinoatrial node, however, are ...
based on what it senses. Rather, it can be programmed to send out electrical impulses at a fixed rate. In any case, it is the pacemaker generator that is capable of sensing trouble within the heart and then generating and delivering the signal through the leads that will correct the ...
The heart is the circulatory system's primary organ. It is responsible for driving blood throughout the body, thereby providing the body with essential components such as oxygen.Answer and Explanation: The heart is made of three primary layers. The innermost layer is the endocardium, which is ...
heart rhythmelectrical pacingThe function of a pacemaker is to provide a cardiac rhythm that maintains a cardiac output adequate for normal activity, and in extreme situations, an output compatible with life. As such, a pacemaker may be required for maintenance of a normal cardiac output in ...