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Medicine

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Cardiology

Question
42 out of 57
 

Most important ECG finding in non Q MI is? (PNQ)



A ST elevation
B Symmetrical T wave inversion

C Q wave
D Tall T wave

Ans. B

Symmetrical T wave inversion

MI:

1. Within minutes, the T wave may become peaked (Earliest features) Q.

2. Within 2-3 hrs, ST segments may begin to rise (Pardees sign) Q

3. Within 8-12 hrs, the T wave inverts Q

4. Within 24 – 48 hrs, pathological Q waves. Q waves usually persist in old MI Q.

Extra Edge: Tall T is the earliest manifestation of acute MI. (FAQ)

Site of MI

1. The leads affected reflect the site of the infarct:

a. Inferior (II, III, aVF) Q,

b. Anterolateral (V4- V6, I, aVL) Q,

c. Anteroseptal (V1-V3) Q,

d. Posterior (tall R and ST depression in V1 – V2). Q

2. 'Non-Q wave infarcts' (formerly called subendocardial infarcts) have changes without Q waves.

There is symmetrical T wave inversion. Q

Exercise ECG testing

The patient undergoes a graduated, treadmill exercise test, with continuous 12-¬lead ECG and blood pressure monitoring. There are numerous treadmill protocols' the 'Bruce protocol' is the most widely used. '

Stress echocardiography is used to evaluate ventricular function, ejection fraction, myocardial thickening, and regional wall motion pre- and post-exercise

Extra Edge:Dobutamine Q or dipyridamole Q may be used if the patient cannot exercise:

Cardiology Flashcard List

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