If both fail, a final tertiary pacemaker (Bundle of His) may coordinate contractions at a constant rate of roughly 30 - 40 bpm Fibrillation chaotic, irregular contractions of the heart, as in atrial or ventricular fibrillation Defibrillation The use of electrical shock to restore the heart's ...
◦ Pacemaker of the heart- Signal generated by SA node passes thru walls of R. atrium propagated by thecardiac muscle- Signal transferred to the AV node- Av node distributes signal to ventricles through the AV bundle and left and rightbundle branches- L and R bundle branches pass on each...
用Quizlet學習並牢記包含1) The pacemaker rhythm that determines heart rate is called ___ rhythm.、2) The ECG ___ wave interval represents ventricular repolarization.、3) The ___ layer of the serous pericardium covers the heart.等詞語及更多
Sinuatrial (SA) node The pacemaker that determines the heart rate atrioventricular (AV) node The electrical gateway to the ventricles AV bundle Signals leave the AV node and descend along this structure toward the apex subendocardial conducting network Distributes the electrical excitation to the ve...
用Quizlet學習並牢記包含Intrinsic、Action Potential Initiation by Pacemaker Cells、Three parts of an action potential in pacemaker cells:等詞語及更多內容的單詞卡。
Function of Pacemaker cells they spontaneously depolarize and generate A.P.s (this is why heart can beat outside the body) Conducting Fibers (4 types) They carry APs to specific locations in the heartJunctional FibersBundle of H.I.SLeft and Right bundle branchesPurkinje Fibers Junctional fibers...
•The heart is described as being ___ because it sets its own rhythm without a need for input from the nervous system -It has its own pacemaker and electrical system autorhythmic •striated, short, thick, branched cells, one central nucleus surrounded by light-staining mass o...
imaging technique using ultrasound to create moving image; utilized to evaluate blood flow through blood vessels, movement of heart valves, and movement of heart muscle during contraction artificial pacemaker an implanted electronic device that takes over the function of the natural cardiac pacemaker (sm...
Which layer of the heart is made of muscle tissue and pumps the blood through the system? Myocardium Which of these tissues is known as the body's "natural pacemaker?" SA node Which component of the ECG cycle shows ventricular depolarization? QRS Which wave of the ECG cycle shows atrial de...