AdventHealth EKG Exam 2026/2027 Actual Exam Questions with Verified Answers & Detailed Rationales | Cardiac Rhythm Interpretation | Grade A | Telemetry & NCLEX-RN® Prep

INSTANT PDF DOWNLOAD — This is the comprehensive EKG Exam preparation guide for AdventHealth (2026/2027), featuring actual exam questions with verified answers and detailed rationales. Designed for nurses, telemetry technicians, and healthcare professionals preparing for the AdventHealth EKG competency exam, this resource consolidates the essential cardiac rhythm interpretation concepts required to pass the EKG exam and excel in cardiac monitoring. The guide is meticulously aligned with AdventHealth standards, ACLS guidelines, and current evidence-based cardiac rhythm interpretation protocols. This verified resource provides comprehensive coverage of key AdventHealth EKG Exam topics, including: Cardiac Anatomy and Electrophysiology (SA node (primary pacemaker, 60-100 bpm), AV node (secondary pacemaker, 40-60 bpm), Bundle of His, Purkinje fibers (tertiary pacemaker, 20-40 bpm), depolarization (contraction, electrical activation, QRS complex), repolarization (relaxation, electrical recovery, T wave), refractory periods (absolute (no response to any stimulus), relative (response to strong stimulus), supernormal (response to weak stimulus)), EKG paper (standard speed 25 mm/sec, 1 small box = 0.04 seconds, 1 large box (5 small boxes) = 0.20 seconds, 5 large boxes = 1 second, 300 large boxes = 1 minute), voltage (1 mV = 10 mm tall, calibration standard at beginning of tracing), leads (limb leads (I, II, III, aVR, aVL, aVF), precordial leads (V1-V6)), EKG components (P wave (atrial depolarization, 0.12 seconds, 2.5 mm tall, upright in I, II, aVF, V4-V6, inverted in aVR), PR interval (onset of P wave to onset of QRS, 0.12-0.20 seconds (3-5 small boxes), represents AV conduction time, prolonged in AV block), QRS complex (ventricular depolarization, 0.12 seconds (3 small boxes), 0.10 seconds ideal), ST segment (end of QRS to onset of T wave, isoelectric (flat), elevated or depressed in ischemia, injury, pericarditis), T wave (ventricular repolarization, upright in leads with upright QRS (I, II, V3-V6), inverted in aVR, V1 may be inverted or upright, hyperacute T waves (tall, peaked, early sign of STEMI), inverted T waves (ischemia, strain, PE, intracranial hemorrhage), peaked T waves (hyperkalemia), flattened T waves (hypokalemia, ischemia, digoxin effect)), QT interval (onset of QRS to end of T wave, rate-corrected (QTc) 0.44 seconds in men, 0.46 seconds in women, prolonged in electrolyte disturbances (hypokalemia, hypocalcemia, hypomagnesemia), medications (amiodarone, sotalol, dofetilide, ibutilide, methadone, haloperidol (IV), ziprasidone, citalopram, levofloxacin, moxifloxacin, azithromycin, clarithromycin, ondansetron), congenital long QT syndrome (LQTS types 1-15), torsades de pointes risk), U wave (repolarization of Purkinje fibers, small upright wave after T wave, prominent in hypokalemia, bradycardia, hypercalcemia, medications (digoxin, dofetilide, sotalol, amiodarone), inverted U wave in ischemia, hypertension, valvular disease), EKG paper calculation methods (rate calculation—300 method (300 divided by number of large boxes between R waves, for regular rhythms only, works for rates 60-100, less accurate for fast or slow rates), 1500 method (1500 divided by number of small boxes between R waves, for regular rhythms only, more accurate than 300 method), 6-second method (count number of R waves in 6 seconds (30 large boxes), multiply by 10, for irregular rhythms (atrial fibrillation, atrial flutter, frequent PACs, PVCs)), sequence method (remember 300, 150, 100, 75, 60, 50 (1 large box between R waves = 300 bpm, 2 = 150, 3 = 100, 4 = 75, 5 = 60, 6 = 50)), rhythm regularity (measure R-R intervals across tracing, regular (vary by 0.12 seconds or 3 small boxes), irregular (vary by 0.12 seconds), regularly irregular (pattern repeats, second-degree AV block type I (Wenckebach)), irregularly irregular (no pattern, atrial fibrillation, atrial flutter with variable block, frequent PACs/PVCs)), P wave analysis (present or absent, shape (upright, inverted, biphasic, peaked, notched, sawtooth (flutter waves), fibrillatory (f waves)), relationship to QRS (one P wave for each QRS, PR interval constant or varying, AV dissociation), QRS analysis (narrow (0.12 seconds, supraventricular rhythm), wide (≥0.12 seconds, ventricular rhythm, bundle branch block (RBBB, LBBB), ventricular paced rhythm, WPW (preexcitation, delta wave)), QT interval measurement (from beginning of QRS to end of T wave, measure in lead with longest QT, use lead II or V5-V6, correct for heart rate (Bazett formula: QTc = QT / √(RR interval in seconds), Fredericia, Framingham, Hodges formulas available), normal QTc 0.44 sec men, 0.46 sec women, prolonged QTc 0.50 sec high risk torsades, monitor for syncope, seizures, sudden death, check medications, electrolytes (K+, Mg++, Ca++), ECG changes in electrolyte imbalances (hyperkalemia (peaked T waves (tenting), wide QRS, loss of P wave, sine wave, asystole), hypokalemia (U waves, flat T waves, ST depression, prolonged QT, arrhythmias (PVCs, VT, torsades)), hypercalcemia (shortened QT, Osborn wave (J wave) in hypothermia, not hypercalcemia, Osborn wave in hypothermia, hypercalcemia shortens QT), hypocalcemia (prolonged QT, normal T wave, hypocalcemia does not cause peaked T waves, that is hyperkalemia), hypermagnesemia (prolonged PR, QRS, QT, bradycardia, heart block, asystole), hypomagnesemia (prolonged QT, torsades, U waves, hypomagnesemia potentiates hypokalemia, refractory to potassium replacement until magnesium corrected)), normal sinus rhythm (NSR) (rate 60-100 bpm, regular, P wave before each QRS, upright in I, II, aVF, V4-V6, PR interval 0.12-0.20 sec, QRS 0.12 sec, treatment (none), sinus bradycardia (rate 60 bpm, regular, all other NSR criteria, causes (normal in athletes, sleep, vasovagal response, increased ICP, hypothyroidism, hypothermia, hyperkalemia, inferior MI, medications (beta-blockers, CCBs (verapamil, diltiazem), digoxin, amiodarone, clonidine, lithium, opioids, propofol