NUR 210 EX 2 Dysrhythmias Exam Question and Answers | Graded A+ | Updated 2026

NUR 210 EX 2 Dysrhythmias Exam Question and Answers | Graded A+ | Updated 2026 pathway of the heart - answer--SA node -AV node -Bundle of His -Bundle Branches -Purkinje Fibers Action potential - answer-signals from the SA and AV node causes ions (Na, K, Ca) to move in and out of the heart muscle cells, triggering changes that make the cells ready to contract Depolarization - answer-phase when the heart contracts Repolarization - answer-process that returns the cell to its resting state When interpreting the ECG, the nurse would keep in mind which of the following about the P wave? A. Reflects electrical impulse beginning at the SA node B. Indicates electrical impulse beginning at the AV node C. Reflects atrial muscle repolarization D. Identifies ventricular muscle depolarization - answer-A Thin and narrow QRS means - answer-rhythm originates in the atrial Wide and bizarre QRS means - answer-rhythm originates in the ventricle Normal Sinus Rhythm - answer--rate: 60-100bpm-Regular rhythm -P waves: present -QRS: thin and narrow (atrial rhythm) Risk factors for dysrhytmias - answer--history of heart disease (CAD, prior heart surgery, high BP, congenital heart disease, MI) -thyroid issues -DM -Electrolyte imbalances -Sleep apnea -Alcohol, stimulants, meds Classification of rhythms: sinus - answer-sinus bradycardia and sinus tachycardia QRS thin and narrow Classification of rhythms: atrial - answer--atrial fibrillation and atrial flutter QRS thin and narrow Classification of rhythms: ventricular - answer-ventricular fibrillation, ventricular flutter, premature ventricular contractions (PVC) -QRS wide and bizarre Classification of rhythms: atrial-ventricular conduction blocks - answer-third-degree heart block (complete heart block) Sinus Bradycardia - answer--under 60bpm -regular rhythm -p waves present-QRS thin and narrow Asymptomatic Bradycardia - answer--athletes and very physically active people -people on medications that slow the heart rate -sleep Symptomatic Bradycardia - answer-syncope, chest pain, hypotension, SOB, diaphoresis Treatment for bradycardia - answer--oxygen -1st line medication for symptomatic bradycardia; ATROPINE IV -assess and treat the cause: -hypoxia -ischemia (hypotension, MI, coronary spasm) -electrolyte imablance -med toxicity (beta-blockers, CCB, digoxin) If the patient is symtpomatic bradycardia and you gave atropine an dit doesnt work what should you do - answer-transcutaneous pacing or transvenous pacing and if its chronic you give a pacemaker What rhythm is this? - answer-sinus bradycardia what rhythm is this? - answer-sinus tachycardia how do we treat sinus tachycardia - answer-treat the cause what rhythm is this? - answer-a fib -no p wave present What rhythm is this? - answer-a flutter