Module 1

Question 1

Einthoven’s Triangle

Answer 1

frame of reference, body is a large conducting medium

Question 2

ECG

Answer 2

record of electrical activity of atrial and ventricular cells (only depolarization and repolarization); gives info on heart orientation, conduction, shows presence of ischemic damage and mass of muscle

Question 3

Ambulatory ECG (Holter)

Answer 3

good for detecting myocardial ischemia; 24hr portable ECG, gives qualitative and quantitative means of detecting cardiac events

Question 4

Exercise Tolerance Testing (ETT)

Answer 4

stress test; for diagnosis and follow up patients with ischemic heart disease; gives info for prognosis and severity of illness

Question 5

ST segment

Answer 5

interval btw ventricular depolarization and repolarization; most reliable indicator of myocardial ischemia (Restiction)

Question 6

Tilt table technique

Answer 6

assess bodies HR and BP response to change in position; test is positive if patient develops drop in BP

Question 7

Signal Averaging Technique

Answer 7

enables recording of low level cardiac signals; to identify ventricular late potentials (VLP) and t-wave alterans (TWA); aligns each beat for a specified number of beats over selected period of time