-Sets the pace for the heart and is called the heart's pacemaker. Atrioventricular node (AV node) -Depolarization wave spreads via gap junctions throughout the atria to the AV node -Located in the inferior portion of the interatrial septum above the tricuspid valve ...
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...
Conducting System of the Heart - The SA node ◦ initiates and regulates the impulses of contraction ◦ 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 ventr...
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
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 ...
2:1 ratio of P waves to QRS complexes An ECG tracing from someone with a third-degree AV block is best described as a tracing with a ___. Sinuatrial (SA) node The pacemaker that determines the heart rate atrioventricular (AV) node The electrical gateway to the ventricles AV bundle Signa...
•normal pacemaker of the entire heart SA node •Located near the right AV valve at lower end of interatrial septum•Acts as an electrical gateway to the ventricles•Fibrous skeleton prevents currents from getting to ventricles by any other route AV node •Pathway by which sign...
用Quizlet學習並牢記包含You would teach the mother of a boy with tetralogy of Fallot that if he suddenly becomes cyanotic and dyspneic to a) lie him supine with the head turned to one side. b) lie him prone, being sure he can breathe easily. c) place h
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...