HOAG ECG CERTIFICATION EVALUATION
EXAMS SOLVED QUESTIONS PRACTICE
SOLUTION VERIFIED
◉ Cardiac Conduction: Interrupted or Altered. Answer: The electrical
pathway may become interrupted or altered depending on a patient's
acute or chronic condition. If the SA node is damaged or impaired, the
AV node will initiate an electrical impulse at a rate of 40-60 beats per
minute. If the AV node is damaged or impaired, the purkinje fibers
will initiate an electrical impulse at a rate of 20-40 beats per minute.
◉ Blood Flow Through the Heart. Answer: 1) The inferior and
superior vena cava returns deoxygenated blood from the body to the
right atrium
2) The right atrium delivers deoxygenated blood to the right ventricle
through the tricuspid valve
3) The right ventricle pumps the deoxygenated blood through the
pulmonic valve to the pulmonary arteries. The lungs provide oxygen
and "oxygenate" the blood.
4) Oxygenated blood flows through the pulmonary veins to the left
atrium.
5) The left atrium delivers blood to the left ventricle through the
mitral valve.
6) The left ventricle pumps oxygenated blood through the aortic valve
where it is distributed throughout the body.
, ◉ Electricity and Blood Flow. Answer: 1) Electrical activity, atrial
contractions and ventricular contractions are interconnected
2) If the electrical pathway is altered or impaired (i.e. atrial
fibrillation, ventricular tachycardia), the blood flow pathway is also
affected.
◉ P wave. Answer: The P wave represents atrial contraction or
depolarization
◉ QRS Wave/Complex. Answer: The QRS wave/complex represents
ventricular contraction or depolarization
◉ Q wave. Answer: The Q wave is the first negative deflection after
the P wave
◉ R Wave. Answer: The R wave is the first positive deflection after
the P wave
◉ S wave. Answer: The S wave is the first negative deflection after
the R wave
◉ Normal QRS Interval. Answer: The normal QRS interval is 0.04 -
0.12 seconds
EXAMS SOLVED QUESTIONS PRACTICE
SOLUTION VERIFIED
◉ Cardiac Conduction: Interrupted or Altered. Answer: The electrical
pathway may become interrupted or altered depending on a patient's
acute or chronic condition. If the SA node is damaged or impaired, the
AV node will initiate an electrical impulse at a rate of 40-60 beats per
minute. If the AV node is damaged or impaired, the purkinje fibers
will initiate an electrical impulse at a rate of 20-40 beats per minute.
◉ Blood Flow Through the Heart. Answer: 1) The inferior and
superior vena cava returns deoxygenated blood from the body to the
right atrium
2) The right atrium delivers deoxygenated blood to the right ventricle
through the tricuspid valve
3) The right ventricle pumps the deoxygenated blood through the
pulmonic valve to the pulmonary arteries. The lungs provide oxygen
and "oxygenate" the blood.
4) Oxygenated blood flows through the pulmonary veins to the left
atrium.
5) The left atrium delivers blood to the left ventricle through the
mitral valve.
6) The left ventricle pumps oxygenated blood through the aortic valve
where it is distributed throughout the body.
, ◉ Electricity and Blood Flow. Answer: 1) Electrical activity, atrial
contractions and ventricular contractions are interconnected
2) If the electrical pathway is altered or impaired (i.e. atrial
fibrillation, ventricular tachycardia), the blood flow pathway is also
affected.
◉ P wave. Answer: The P wave represents atrial contraction or
depolarization
◉ QRS Wave/Complex. Answer: The QRS wave/complex represents
ventricular contraction or depolarization
◉ Q wave. Answer: The Q wave is the first negative deflection after
the P wave
◉ R Wave. Answer: The R wave is the first positive deflection after
the P wave
◉ S wave. Answer: The S wave is the first negative deflection after
the R wave
◉ Normal QRS Interval. Answer: The normal QRS interval is 0.04 -
0.12 seconds
