ALU 301 Chapter 7 Quiz Flashcards
All of the following statements regarding heart function are correct EXCEPT:
- The contraction of the muscle cells must occur at regular intervals and be synchronized
- Ventricular contractions must be forceful
- The heart valves must be competent, allowing two directional blood flow thru the heart
- The ventricles must fill adequately during diastole
The heart valves must be competent, allowing two directional blood flow through the heart
Electrical activation of myocardial cells due to the spread of an electrical impulse is called:
- contraction
- depolarization
- repolarization
- charging
Depolarization
The P wave represents:
- atrial depolarization
- ventricular repolarization
- ventricular depolarization
- time required for both depolarization and repolarization of the ventricles
atrial depolarization
All of the following factors affect heart rate EXCEPT:
- age
- gender
- fitness level
- illness
gender
The primary pacemaker of the heart is:
- Atrioventricular (AV) node
- bundle of HIS
- right bundle branch
- sinoatrial (SA) node
sinoatrial (SA) node
Which of the following statements regarding sinus arrhythmia is/are correct?
A - it is normal variant of sinus rhythm
B - there are changes in the heart rate that correspond with the phases of respiration
C - there is no mortality risk associated with it
C only is correct
A and B are correct
B and C are correct
A, B, and C are correct
A, B, and C are all correct
Which of the following is/are possible causes of atrial fibrillation?
A - pulmonary disease
B - cardiomyopathy
C - hypothyroidism
C only is correct
A and B are correct
B and C are correct
A, B, and C are correct
A and B are correct
Which of the following is included in a cardiac workup for atrial fibrillation?
A - stress imaging study
B - resting echocardiogram
C - complete blood count
A only is correct
A and B are correct
B and C are correct
A, B, and C are all correct
A and B are correct
Which of the following can cause a complete right bundle branch block (CRBBB)?
A - left ventricular hypertrophy (LVH)
B - atrial septal defect (ASD)
C - coronary artery disease
A and B are correct
A and C are correct
B and C are correct
A, B, and C are correct
B and C are correct
The T wave on the EKG represents:
- atrial depolarization
- atrial contraction
- ventricular repolarization
- ventricular depolarization
ventricular repolarization
Complications associated with atrial fibrillation include all of the following EXCEPT:
- embolic stroke
- ischemia
- mitral insufficiency
- congestive heart failure
mitral insufficiency
All of the following statements regarding myocardial ischemia are correct EXCEPT:
- it is a temporary reversible reduction in blood supply to the heart muscle
- it is represented by T wave changes on the EKG
- it is represented by significant Q wave on the EKG
- it is the earliest sign of reduced coronary blood flow
It is represented by significant Q wave on the EKG
The primary EKG indicator of a previous myocardial infarction is the appearance of:
- prolonged QRS duration
- significant T wave inversions
- third degree AV block
- significant Q waves
significant Q waves
The heart arrhythmia best described as an irregularly irregular rhythm is:
- Wolff-Parkinson-White Syndrome (WPW)
- atrial fibrillation
- sick sinus syndrome (SSS)
- unifocal PVC’s
atrial fibrillation
Which of the following is/are considered heart blocks?
A - sick sinus syndrome
B - sinoatrial (SA) block
C - prolonged QT syndrome
A only is correct
A and B are correct
B and C are correct
A, B, and C are all correct
A and B are correct
Which of the following are significant causes of premature ventricular contractions (PVC’s)?
A - illicit drugs
B - stress
C - mitral valve prolapse
C only is correct
A and B are correct
A and C are correct
B and C are correct
A and C are correct