CBM revision #

Question 1

In an ECG, what is the zero volts reference point?

Answer 1

right foot

both arms, l leg record signals

Question 2

normal duration of the P wave

Answer 2

<0.11 seconds

Question 3

normal duration of the PR interval

Answer 3

0.12-0.2 `

Question 4

bundle branch blocks

Answer 4

QRS complex widens >0.12s and QRS morphology changes

Question 5

rate for tachycardic

Answer 5

> 100bpm

Question 6

rate for bradycardic

Answer 6

<60bpm

Question 7

what is the dicrotic notch

Answer 7

small downward deflection in the arterial pulse
follows the closure of the semilunar valves
preceding the dichrotic wave
used as a marker for the end of systiole or the ejection period

Question 8

An enzyme that is involved in the synthesis of prostacyclin and thromboxane

Answer 8

cyclooxygenase

Question 9

Vasodilator that stimulates B1 receptors on endothelial cells to release vasodilator mediators.

Answer 9

bradykinin

Question 10

The presence of an abnormal third heart sound usually occurs during this phase and is indicative of turbulent ventricular filling.

Answer 10

rapid ventricular filling

Question 11

The presence of an abnormal third heart sound usually occurs during this phase and is indicative of turbulent ventricular filling.

Answer 11

isovolumetric contraction

Question 12

Atrial and venous pressures change due to this phase.

Answer 12

atrial systole

Question 13

Approximately what percentage of cases of hypertension have no identifiable cause ?

Answer 13

90-95%