CH. 18 review questions
The patient has been diagnosed with a heart murmur. How would this diagnosis be initially detected? a. Pulse rate b. ECG c. blood pressure d. auscultation
d. auscultation
Which of the following does NOT represent heart rate? a. heart rate is equal to the number of heart sounds per minute b. heart rate is equal to the number of heartbeats per minute c. heart rate for a healthy individual is between 70 and 80 beats/ min at rest d. heart rate is equal to the number of cardiac cycles per minute
a. heart rate is equal to the number of heart sounds per minute
In an ECG tracing, what does the QRS complex represent? a. ventricular depolarization and atrial repolarization b. atrial depolarization c. ventricular repolarization d. atrial repolarization only
a. ventricular depolarization and atrial repolarization
What is happening in the heart when we hear heart sounds? a. the SL valves are closing b. Both AV and SL valves close c. the AV valves are closing d. The AV and SL valves are opening
b. both AV and SL valves close
What is being measured when a pulse is taken? a. opening and closing of SL valves b. the pressure drop during ventricular diastole and rise during ventricular systole c. opening and closing of AV valves d. the change of voltage through the heart
b. the pressure drop during ventricular diastole and rise during ventricular systole
During auscultation the second sound is briefer and sharper than the first (DUPP or DUBB). The sound occurs at: a. ventricular diastole during relaxation of the ventricles, the SL valves open b. ventricular diastole during relaxation of the ventricles, the SL valves close c. ventricular systole, when the AV valves open d. ventricular systole, when the AV valves close
b. ventricular diastole during relaxation of the ventricles, the SL valves close
What is the correct order of the electrical signals of the conduction system of the heart? a. SA node, AV bundle, AV node, purkinje fibers b. AV node, AV bundle, purkinje fibers, SA node c. SA node, AV node, AV bundle, purkinje fibers d. AV bundle, purkinje fibers, AV node, SA node
c. SA node, AV node, AV bundle, purkinje fibers
When listening to heart sounds (auscultation), the first sound heard is referred to as LUBB. This sound is produced by: a. the blood flowing against the SL valves causing them to close b. blood turbulence causing the closure of the two AV valves at ventricular diastole c. blood turbulence causing the closure of the two AV valves at ventricular systole d. blood flow against the two SL valves during ventricular relaxation
c. blood turbulence causing the closure of the two AV valves at ventricular systole
What can also be measured by an ECG? a. blood pressure b. opening and closing of AV valves c. heart rate d. opening and closing of SL valves
c. heart rate
The pacemaker of the heart is the _______. a. atrioventricular bundle b. atrioventricular node c. sinoatrial node d. semilunar valve
c. sinoatrial node
