Duration of pr interval Study guides, Class notes & Summaries

Cardiac conduction ECG components Heart auscultation All people enjoy time magazine Aortic, pulmonic, Erb's point, tricuspid, mitral P wave P wave= time for passage of the electrical impulse through the atrium causing atrial depolarization (contraction) Normal: 0.06-0.12 sec (remember, p for preteen: 6-12) What is a source of possible variation in P wave? disturbance in conduction w/in atria PR interval (PRI) -Measured from beginning of P wave to beginning of QRS comple...

Pt on Vtach, HR 135, RR 32, BP 90/48, conscious but c/o dizziness, recent K+ lvl is 3.4. What action would you do first? a. emergent defib b. amio 300mg IVP c. emergent cardioversion d. hang 10 mEq KCL/50mL D5W CORRECT ANSWER C The nurse notes the following when analyzing a patient's telemetry strip: HR, 65/min and regular; PR interval, 0.22 seconds; QRS complex, 0.10 seconds; QTc, 0.52 seconds. Which of the following dysrhythmias is the patient at risk for? A. Atrial fibrillation bec...

What are the 6 parts of the cardiac conduction cycle? correct answer: -SA node -Internodal pathways -AV node -Bundle of His -R and L bundle branches -Purkinje fibers What is the SA node? correct answer: -Small cluster of cells located in the upper R atrium *-Pacemaker of the heart* What are internodal pathways? correct answer: Impulses sent by the SA node that travel through the atrial muscle fibers via the intra-atrial pathways Allows for simultaneous depolarization and contra...

Pt on Vtach, HR 135, RR 32, BP 90/48, conscious but c/o dizziness, recent K+ lvl is 3.4. What action would you do first? a. emergent defib b. amio 300mg IVP c. emergent cardioversion d. hang 10 mEq KCL/50mL D5W - Answer C The nurse notes the following when analyzing a patient's telemetry strip: HR, 65/min and regular; PR interval, 0.22 seconds; QRS complex, 0.10 seconds; QTc, 0.52 seconds. Which of the following dysrhythmias is the patient at risk for? A. Atrial fibrillation because th...

Automaticity correct answer: Ability to initiate an impulse at a regular interval; "pacemaker" Excitability correct answer: Ability of the heart to respond to a stimulus Conductivity correct answer: Ability of the heart to transmit an electrical impulse from one cell membrane to another Contractility correct answer: The ability of the heart muscle cells to shorten in response to an electrical stimulus Refractoriness correct answer: "Resistant to"; cannot respond to a stimulu...

PCCN Practice Exam Notes (2024) with Complete Solutions PCCN Practice Exam Notes (2024) with Complete Solutions PCCN Practice Exam Notes (2024) with Complete Solutions Pt on Vtach, HR 135, RR 32, BP 90/48, conscious but c/o dizziness, recent K+ lvl is 3.4. What action would you do first? a. emergent defib b. amio 300mg IVP c. emergent cardioversion d. hang 10 mEq KCL/50mL D5W - ANSWER-C The nurse notes the following when analyzing a patient's telemetry strip: HR, 65/min and ...

Pt on Vtach, HR 135, RR 32, BP 90/48, conscious but c/o dizziness, recent K+ lvl is 3.4. What action would you do first? a. emergent defib b. amio 300mg IVP c. emergent cardioversion d. hang 10 mEq KCL/50mL D5W - C The nurse notes the following when analyzing a patient's telemetry strip: HR, 65/min and regular; PR interval, 0.22 seconds; QRS complex, 0.10 seconds; QTc, 0.52 seconds. Which of the following dysrhythmias is the patient at risk for? A. Atrial fibrillation because the PR in...

A branch of the _______________ supplies the right atrium and right ventricle with blood. correct answer: right coronary artery (RCA) Stimulation of parasympathetic nerve fibers typically results in which of the following actions? correct answer: Slowed conduction through the atrioventricular (AV) node The contribution of blood that is added to the ventricles and results from atrial contraction is called correct answer: atrial kick. Which of the following are semilunar valves? correc...

1. A nurse is assessing a client who is 12hr postoperative following a colon resection. Which of the following findings should the nurse report to the surgeon? a. Heart rate 90/min b. Absent bowel sounds c. Hgb 8.2 g/dl d. Gastric pH of 3.0 Rationale: Normal Hgb is 13-18M g/dl, 12-16 g/dl. This may indicate a possible hemorrhaging. 2. A nurse is caring for a client who has diabetes insipidus. Which of the following medications should the nurse plan to administer? a. Desmopressin b. Reg...

CRAT exam: ECG Interpretation7 steps, analyzing 12 lead ECG 1. Determine ECG rhythm or regularity 2. Determine atrial ventricular rate. 3. Identify a P-wave morphology. 4. Measure the PR interval. 5. Measure the QRS duration, analyze the morphology. 6. Evaluate the leads in groups. 7. Identify the morphological changes. 12 lead ECG reading BIG LIE, LITTLE LIE, SAY, ALL Big LIE I: lateral II: inferior III: inferior LITTLE LIE aVR: not used for MI interpretation. Useful for dex...