Av node firing - Study guides, Class notes & Summaries

NYU ECG Exam Questions & Answers 2024/2025 sympathetic autonomic innervation of the heart - ANSWERSreleases epi, increases hr, CO and BP, Increased firing of the SA node Automaticity electrical heart cells - ANSWERSCells ability to spontaneously generate impulses p wave - ANSWERSatrial depolarization QRS complex - ANSWERSventricular depolarization pr interval - ANSWERStime from sa node to av node t wave - ANSWERSventricular repolarization sa node impulse rate - ANSWERS60-1...

NURA 2500 CARDIO TEST QUESTIONS AND ANSWERS What are the symptoms of an AV block? - Answer--fainting/syncope -heart failure -cardiac arrest and death -hypotension This is the mildest form of the heart blocks and is rarely symptomatic. There are very few times this rhythm will receive treatment. - Answer-first degree heart block In first degree heart block the electrical signals from the atria to the ventricles are - Answer-delayed, causing long PR intervals In a first degree heart ...

Cardiovascular Unit - Bridge to NCLEX Test 2 Latest Version Graded A+ A patient with a tricuspid valve disorder has impaired blood flow between the... A - vena cava and right atrium B - left atrium and left ventricle C - right atrium and right ventricle D - Right ventricle and pulmonary artery C - right atrium and right ventricle Rationale: The tricuspid valve is found between the right atrium and right ventricle. A patient with a severe blockage in his right coronary artery. Whi...

NURS 7001 Exam 2 Questions & Answers Ch. 35. Dysrhythmias - EKG Interpretation Polarization - ANSWER->At rest Depolarization - ANSWER->Contraction Repolarization - ANSWER->Recovering, or return to resting What is the electrical conduction system of the heart? - ANSWER->SA (sinoatrial) node, through atria, AV (atrioventricular) node, bundle of his, bundle branches, purkinje fibers SA (sinoatrial) Node - ANSWER->Primary pacemaker Located in upper right atrium Inherent 60-1...

what does each small box represent - .04 seconds what does 1 large box (5 small boxes) represent - .20 seconds what do 5 large boxes represent - 1 second primary pacemaker - SA node w/expected firing rat of 60-100 bpm backup pacemaker - AV node w/expected firing rate of 40-60 bpm final pacemaker - ventricles w/expected firing rate less than 40 bpm a normal PR interval is - .12-.20 seconds a normal QRS interval is - < .12 seconds (.04-.11) a normal QT interval is - .36-.44 seconds

2 types of cardiac cells - Electrical -specialized cells which conduct electrical impulses -these cells start and transmit electrical activity in the heart Mechanical -cells which make up bulk musculature in the heart -these cells contract in response to stimuli from the electrical cells 2 types of cardiac cells - Electrical -specialized cells which conduct electrical impulses -these cells start and transmit electrical activity in the heart Mechanical -cells which make up bulk musculat...

why we can have premature beats that arise from the atrium, or pre mature beasts that arise form ventricles, v fib from - ANS excitability ability to receive and respond to stimuli - ANS excitability The ability of the heart to generate and conduct electrical impulses on its own. - ANS automaticity transmit electrical impulse across cell membranes cell to cell - ANS conductivity The strength of contraction of the heart at any given end-diastoli...

med-surg-practice-exam102FIRST-DEGREE HEART BLOCK 1. Select all the correct options below that to describe the rhythm above: A. Regular P Waves B. PR Interval <0.20 seconds C. Regular Ventricular Rhythm D. First-Degree Heart Block E. Second-Degree Type I Heart Block (Mobitz type I) F. PR Interval >0.20 seconds The answers are A, C, D, and F. It contains regular p waves, rand regular ventricular rhythm, is a first-degree heart block, and has a PR interval that is >0.20 seconds....

1. A missing p-wave indicated what structure is not depolarizing/firing properly thus not properly depolarizing the atrium? a. AV node b. SA node c. Bundle Branches d. Perkinje Fibers 2. When left ventricular pressure begins to increase, this will be the driving force to open what valve? a. Pulmonary valve b. Tricuspid Valve c. Aortic Valve d. Bicuspid Valve 3. What is CO with the following values: HR: 60 BPM Systolic BP: 120 mmHg, Diastolic: BP: 80 mmHg, Stroke volume: 60 mL/beat a. 1.5 L/min b...

NURS 7001 Exam 2 Questions & Answers Ch. 35. Dysrhythmias - EKG Interpretation Polarization - ANSWER->At rest Depolarization - ANSWER->Contraction Repolarization - ANSWER->Recovering, or return to resting What is the electrical conduction system of the heart? - ANSWER->SA (sinoatrial) node, through atria, AV (atrioventricular) node, bundle of his, bundle branches, purkinje fibers SA (sinoatrial) Node - ANSWER->Primary pacemaker Located in upper right atrium Inherent 60-1...