The radii of two concentric circles are 68 cm and 22 cm. The area of the closed figure bounded by the boundaries of the circles is

TLS Online TPP Program

#Question id: 24440

#Unit 13. Methods in Biology

If the R-R interval is 800 msec (0.8 sec), what is the heart rate?

TLS Online TPP Program

#Question id: 24441

#Unit 13. Methods in Biology

If the heart rate is 90 beats/min, what is the cycle length?

TLS Online TPP Program

#Question id: 24442

#Unit 13. Methods in Biology

Match the following Column I with Column II 

Column I	Column II
A. PR segment	i. Plateau portion of the ventricular action potential
B. PR interval	ii. Conduction through atrioventricular node
C. ST segment	iii. The time from initial depolarization of the atria to initial depolarization of the ventricles
D. ST interval	iv. An isoelectric portion of the QT interval

TLS Online TPP Program

#Question id: 24443

#Unit 13. Methods in Biology

Normal electrocardiograms recorded from the three standard bipolar limb leads (I, II, III). Match the following.

Column I	Column II
a. P wave	i. Positive
b. T wave	ii. Negative
c. R wave
d. S wave

TLS Online TPP Program

#Question id: 24444

#Unit 13. Methods in Biology

What is the His bundle electrogram (HBE)?

TLS Online TPP Program

#Question id: 24445

#Unit 13. Methods in Biology

An electrocardiogram is a painless, noninvasive way to help diagnose many common heart problems. Which of the following would not diagnose by ECG?