HOAG ECG CERTIFICATION EVALUATION
VERIFIED QUESTIONS AND SOLUTIONS
FULL REVIEW PACK
●● 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
VERIFIED QUESTIONS AND SOLUTIONS
FULL REVIEW PACK
●● 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
