1. Describe with a neat sketch how the nanoparticles are prepared employing the top-down methods, namely, milling and lithography. 2. Explain with a suitable diagram, the synthesis of nanostructured materials….
Which of the following rhythms has a constant PR interval for all conducted beats?
A. In 2nd-degree AV heart block, type II,
a. the P waves are all the same.
b. a QRS complex follows each P wave.
c. the pacemaker site is in the AV junction.
d. the ventricular rate is less than 40 beats per minute.
B. Which of the following rhythms has a constant PR interval for all conducted
a. 2nd-degree AV heart block, type I
b. 3rd-degree AV heart block
c. 2nd-degree AV heart block, type II
d. All of the above
C. The difference between 2nd-degree AV heart block, type I, and type
II is that
a. in type I, the PR intervals are progressively longer until a QRS complex
is dropped and the cycle starts over again.
b. the ventricular rate in type II is usually greater than 60 beats per minute.
c. in type II, the P waves appear to march right through the QRS complexes.
d. in type II, there appears to be a pattern to the irregularity.
D. An ECG rhythm that has no correlation between P waves and QRS
is known as (LO 16.5)
a. 1st-degree AV heart block.
b. 2nd-degree AV heart block, type II.
c. 2nd-degree AV heart block, type I.
d. 3rd-degree AV heart block.