HOAG ECG COMPREHENSIVE EXAM 2026 FULL QUESTIONS AND CORRECT ANSWERS ALREADY PASSED

HOAG ECG COMPREHENSIVE EXAM 2026
FULL QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED

●● Primary pacemaker.
Answer: SA node


●● Path of conduction in heart.
Answer: SA node - AV node - bundle of his - R/L bundle branches -
purkinje fibers - ventricular contraction


●● if SA node is damaged what takes over? at what rate?.
Answer: AV node, 40-60 bpm


●● blood flow through heart.
Answer: 1. inferior and superior vena cava recieve deox blood from
body into RA
2. RA gives deox blood to RV through tricuspid valve
3. RV pumps deox blood to lungs through pulmonic valve to pulmonary
artieries. Lungs oxygenate blood
4. oxy blood goes to pulmonary veins to LA
5. LA goes to LV through mitral valve

,6. LV pumps oxy blood through aortic valve to body


●● If electrical pathway is altered or impaired (ex. afib, vtach), what
else is altered?.
Answer: blood flow pathway


●● P wave represents what.
Answer: atrial contraction/depolarization


●● QRS wave represents what.
Answer: ventricular contraction/depolarization


●● Normal QRS interval.
Answer: 0.04-0.12 seconds


●● T wave represents what.
Answer: ventricular relaxation/reploarization


●● PR wave measurement:.
Answer: beginning of P wave to beginning of QRS complex


●● PR interval time.

, Answer: 0.12-0.20 seconds


●● QT interval measurement.
Answer: beginning of QRS to END of T wave


●● QT interval time.
Answer: 0.36-0.44, adjusted for heart rate


●● Length of small box and big box.
Answer: small: 0.04 large: 0.20


●● 6 second tracing method for HR.
Answer: count number of R waves and multiply by 10, best used for
irregular HR


●● 300 method.
Answer: count number of large boxes between 2 R waves and divide
number into 300.


ex: 3 large 5mm boxes between 2 R waves. 300/3 = 100bpm


●● 1500 method.