Basic ECG Interpretation 2026 – 25 Questions & Answers | Ventricular Tachycardia, Atrial Fibrillation, ECG Intervals & Cardiac Conduction | Nursing & Cardiac Monitoring

This document contains approximately 25 exam-style questions and verified answers covering the essential principles of electrocardiogram (ECG) interpretation, cardiac conduction system physiology, rhythm recognition, and emergency dysrhythmia assessment. The material is designed to help students develop a strong foundation in ECG analysis by focusing on waveform interpretation, interval measurement, cardiac rhythm identification, and clinical decision-making. It serves as an effective study resource for nursing students, telemetry technicians, paramedic trainees, and healthcare professionals preparing for ECG competency examinations and cardiovascular monitoring courses. The document begins with a review of cardiac electrical conduction and ECG fundamentals, including the significance of the P wave, T wave, PR interval, QRS complex, and QT interval. Students learn the normal pathway of electrical impulse conduction through the sinoatrial (SA) node, atrial myocardium, atrioventricular (AV) node, Bundle of His, and ventricular conduction system. The material reinforces understanding of how these electrical events appear on an ECG tracing and how interval measurements are used to evaluate normal and abnormal cardiac function. A substantial portion of the content focuses on cardiac dysrhythmia recognition and interpretation. Topics include atrial fibrillation, ventricular tachycardia, ventricular fibrillation, heart block, pulseless electrical activity (PEA), asystole, and normal sinus rhythm. Students learn to identify rhythm characteristics such as absent P waves, unmeasurable PR intervals, widened QRS complexes, rhythm regularity, tachycardia, and conduction abnormalities. The document emphasizes the interpretation of rhythm strips commonly encountered in emergency departments, telemetry units, intensive care settings, and cardiac monitoring environments. The study guide also examines risk factors associated with cardiac dysrhythmias, including hyperkalemia, cardiomyopathy, drowning-related hypoxia, stimulant use, and excessive energy drink consumption. Clinical scenarios help learners understand how electrolyte imbalances, structural heart disease, and physiologic stressors can contribute to rhythm disturbances and increase the risk of life-threatening cardiac events. Special attention is given to prolonged QT intervals and their association with dangerous ventricular arrhythmias. Additionally, the material provides a structured approach to ECG interpretation by teaching students how to systematically analyze rhythm strips through P-wave assessment, PR interval measurement, QRS evaluation, rhythm regularity analysis, heart-rate calculation, and final rhythm identification. This step-by-step methodology mirrors the approach used in clinical practice and professional ECG interpretation courses, making the document highly valuable for both examination preparation and patient care applications. The content closely aligns with major cardiovascular and electrocardiography references, including Dubin's Rapid Interpretation of EKG's, Garcia and Holtz's 12-Lead ECG: The Art of Interpretation, Marriott's Practical Electrocardiography, Hampton's The ECG Made Easy, and the American Heart Association (AHA) Basic Life Support (BLS) and Advanced Cardiovascular Life Support (ACLS) Guidelines. These resources are widely used in nursing, cardiovascular technology, emergency medicine, and allied health education programs. This document is particularly beneficial for students enrolled in Nursing (RN, BSN, ADN, LPN/LVN), Cardiovascular Technology, Paramedic Science, Emergency Medical Services (EMS), Respiratory Therapy, Critical Care Nursing, Medical Assisting, Health Sciences, Electrocardiography (ECG/EKG), and Cardiovascular Nursing courses. It is also highly valuable for telemetry technicians, monitor technicians, emergency department clinicians, ICU personnel, ACLS candidates, and healthcare professionals seeking to strengthen their ECG interpretation and rhythm recognition skills. Keywords: basic ECG interpretation, ECG interpretation, EKG interpretation, cardiac conduction system, electrocardiography, atrial fibrillation, ventricular tachycardia, ventricular fibrillation, pulseless electrical activity, PEA, asystole, heart block, normal sinus rhythm, cardiac dysrhythmias, QT interval, PR interval, QRS complex, cardiac monitoring, telemetry nursing, rhythm strip interpretation, ECG analysis, ACLS preparation, cardiovascular nursing, emergency cardiac care, arrhythmia recognition, nursing exam prep, telemetry certification, cardiac electrophysiology, heart rhythm interpretation, ECG exam questions