DYSRHYTHMIAS QUESTIONS AND
CORRECT ANSWERS GRADED A+
YEAR 2026
Impulse Conduction Pathway - answer-SA Node --> Internodal pathways (Atrial
Contraction) --> AV Node (Delay) --> His-Purkinje System (Ventricular Contraction)
Dysrhythmias Common Causes - answer-Decreased Coronary Perfusion
Myocardial hypoxia
Electrolyte disturbances
Cardiac Muscle Injury
Ischemia or infarction
Defects in heart muscle or electrical system
Cardiac Surgery
Electrical Stimulation to the heart muscle
Medication
Best leads to look at for Afib/Aflutter - answer-II, III, AVF
Best Leads to Assess Junctional Rhythms - answer-Lead II
Best Lead to determine Bundle Cranch Blocks - answer-V1 and or V6
ST Segment Monitoring for RCA - answer-III or aVF
ST Segment Monitoring for LAD/Circumflex - answer-V3
, ST Segment Monitoring for Activity Induced Ischemia - answer-V5
ST Segment Monitoring for unknown problem - answer-III or V3
ECG Zones of MI - answer-
Inferior Wall Leads - answer-II, III, AVF
"INF"
Anterior Wall - answer-V1-V4
Lateral Wall - answer-V5, V6, I, aVL
Best T wave - answer-V3, V4, II
Reciprocal Lead Changes - answer-
Reciprocal Leads for Inferior: II, III, AVF - answer-I, aVL
Reciprocal leads for High Lateral: I aVL - answer-II, III, aVF
Reciprocal leads for Anterior: V1, V2, V3, V4 - answer-NONE
Posterior leads - answer-NONE - you may see reciprocal changes in leads V1-V4
Defibrillation or Cardioversion Definition - answer-Passing of electrical current through
cardiac muscle cells causing massive depolarization allowing cells to reset themselves
and create an environment where SA node can take back the pacemaker function