Atrioventricular av node - Study guides, Class notes & Summaries

Relative refractory periods - ️️occurs towards the end of the T-wave when most ventricular cells are repolarized and vulnerable to new stimuli; can lead to VT if PVC lands during this time Refractory = resistant Supraventricular Tachycardia (SVT) - ️️§ regular but fast rhythm § rate 150-250 § P wave merged with T wave § PRI variable & difficult to measure § QRSà typically narrow § Common causes: stimulants, electrolyte imbalance, hypoxia Sinoatrial Node (SA node) Rate? ...

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Right side of the heart pumps to... Lungs Left side of heart pumps... simultaneously to body Septum wall that separates two pumps atrioventricular valves separate atria and ventricles heard at apex, located at bottom of heart: 5th rib intercostal space Apical pulse is also called Mitral area/PM/Apex Right AV valve = tricuspid valve, 5th intercostal space at left sternal border Left AV valve = Mitral valve, 5th intercostal space at left midclavicular line Semilunar (SL) valves bet...

NSCA-CSCS Exam Chapter 1 Questions and Answers 100% Pass A-Band overlapping actin and myosin acetylcholine Arrival of the action potential at the nerve terminal causes release of a neurotransmitter, ______, which diffuses across the neuromuscular junction. Once a sufficient amount is released, an action potential is generated across the sarcolemma, and the (muscle)fiber contracts. Actin Show up lighter under a microscope. Thin Filaments. In I band and A band. Contains myosin bind...

Portage Learning Anatomy & Physiology 2: Module 4 Exam 100% Pass Which body system supplies cells with oxygen and nutrients and carries away waste? A. Nervous system B. Respiratory system C. Urinary System D. Correct! Circulatory System The heart is contained in the _______ cavity. A. Correct! Pericardial B. Pleural C. Septal D. Rectoperineal Which layer of heart anchors it to the diaphragm? A. Endocardium B. Mediastinal C. Myocardium D. Correct! Pericardium What is the purpose of t...

CCRN PRACTICE UPDATED ACTUAL Exam Questions and CORRECT ANSWERS A patient in the ED with complaints of chest pain. The 12-lead EKG shows ST elevation in leads V3 and V4. Occlusion of the affected coronary artery most likely would affect perfusion to which portion of the conduction system? A. Sinoatrial (SA) node B. Bachmann's bundle C. Atrioventricular (AV) node D. Bundle of His - CORRECT ANSWER- LAD so D. bundle of his

Which heart chamber functions to pump deoxygenated blood to the lungs? a. Right atrium b. Right ventricle c. Left atrium d. Left ventricle ~~> 1. B: The right ventricle pumps the deoxygenated blood it has received from the right atrium to the lungs. The right atrium pumps deoxygenated blood from the body to the right ventricle. The left atrium pumps oxygenated blood from the lungs to the left ventricle. The left ventricle pumps oxygenated blood to the body. 2. Which lead is t...

Accelerated Junctional - Answer Rate: 60-100 Rhythm: Regular Pwave: before/after/absent - inverted PR: unknown QRS: Normal *** Fast junctional escape Asystole - Answer absence of contractions of the heart-Flat Line Atrial fibrillation - Answer rapid, random, ineffective contractions of the atrium Atrial Flutter - Answer Rate:Atrial 250-350 Ventricular: 100 -175 P: Irregular or absent, often "saw tooth" QRS: Normal Conduction: AV Block (2:1 > 3:1, 4:1) Rhythm: Regular ...

Pacemakers of the Heart - Answer Sinoatrial (SA) node Atrioventricular (AV) node Bundle of His Bundle Branches Purkinje Fibers -SA node: p wave -SA node to AV node: PR segment -Impulse travels from Bundle of His to Bundle branches and then to Purkinje fibers: QRS complex -Repolarization of ventricles: T wave P wave - Answer sinoatrial node (SA node) starts an impulse, as the wave of depolarization spreads through the atria, _______ is inscribed on the ECG AV node conduction...

PNVN 1631 Exam 1 Cardio PNVN1631 Medical Surgical Nursing I {Score for this quiz: 66.17 out of 80} Due Oct 4 at 8am Points 80 Questions 80 Available Oct 4 at 4am - Oct 4 at 9pm 17 hours Time Limit 135 Minutes Instructions Read the questions carefully and choose the best options for each item question. This is a 80- item questions, please be mindful of your time. When done, click submit. Good luck and thank you. Attempt History Attempt Time Score LATEST Attempt 1 37 minutes 6...