Because electrical activity triggers mechanical activity, abnormal electrical pa
ID: 3517627 • Letter: B
Question
Because electrical activity triggers mechanical activity, abnormal electrical patterns observed on an ECG can signal abnormal contractile activity of the heart. As a result, ECGs, when read properly, can be a very useful tool in identifying abnormal heart rates, arrhythmias, or damage to heart muscle in patients.
Imagine you have two patients in the same hospital wing. You are tasked to monitor their ECGs, along with their vital signs. The ECGs of your patients, Patient A and Patient B, are in the following charts, along with an ECGs that is more indicative of a normal rate and rhythm. Any changes in the ECG are noted by a black arrow. Use these charts to answer the following questions.
Compare the two patient ECGs. Which of the following do these ECGs have in common? Check all that apply.
a. No definite P waves
b. Arrhythmia
c. Ventricular rate is slower than the atrial rate
1). In Patient A, however, ____(A)_____ ______(B)______ occur for every one _____(C)______.
(A) two, three, four, or five
(B) and (C) P waves , QRS complexes
1B) As a result which of the following best describes Patient A's ECG?
a. 3:1 atrial flutter
b. 2:1 heart block
c. 3:1 heart block
d. 2:1 atrial flutter
2). In Patient B, however, _____(D)_____ _______(E)__________ occur for every one ___(F)_____
(D) two, three, four, or five
(E) and (F) P waves, QRS complexes
2b). As a result, which of the following best describes Patient B's ECG?
a. 3:1 heart block
b. 2:1 heart block
c. 3:1 atrial flutter
d. 2:1 atrial flutter
Normal ECG: Patient A's ECG: Patient B's ECG:Explanation / Answer
b) arrhythmia.
1) in pateint A , however 3 P waves occur for every one QRS complex.
1 B) c. 3:1 heart block. because all atrial impulses are not conducted to the ventricles.
2) in patient B , however, two p waves occur for every one QRS complex.
2b) b. 2:1 heart block.