A patient has been taking digoxin for several years for chronic heart failure is about to receive atropine for another condition. A common effect of digoxin (at therapeutic blood levels) that can be almost entirely blocked by atropine is (a) Decreased appetite (b) Increased atrial contractility (c) Increased PR interval on the ECG (d) Headaches (e) Tachycardia

A patient has been taking digoxin for several years for chronic heart failure is about to receive atropine for another condition. A common effect of digoxin (at therapeutic blood levels) that can be almost entirely blocked by atropine is (a) Decreased appetite (b) Increased atrial contractility (c) Increased PR interval on the ECG (d) Headaches (e) Tachycardia
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Last Answer : Ans: A

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Description : True statements about ECG include: a. the P-R interval corresponds to the duration of atrial systole b. the T-wave ends at the time of aortic valve closure c. the ST segment represents repolarization of the ventricles d. all

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Last Answer : Ans: A

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Last Answer : Ans: B

Which of the following ECG waveforms characterizes conduction of an electrical impulse through the left ventricle? a) QRS complex The QRS complex represents ventricular depolarization b) P wave The P wave is an ECG characteristic reflecting conduction of an electrical impulse through the atria. c) PR interval The PR interval is a component of an ECG tracing reflecting conduction of an electrical impulse through the AV node. d) QT interval The QT interval is an ECG characteristic reflecting the time from ventricular depolarization to repolarization.

Description : Which of the following ECG waveforms characterizes conduction of an electrical impulse through the left ventricle? a) QRS complex The QRS complex represents ventricular depolarization b) P ... QT interval is an ECG characteristic reflecting the time from ventricular depolarization to repolarization.

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Infusion of potassium chloride is indicated in digitalis toxicity when the manifestation(s) is/are: A. Vomiting, hyperapnoea and visual disturbance B. Pulsus bigeminus with heart rate 110/min in a patient on maintenance digoxin therapy C. Ventricular tachycardia in a child who has accidentally ingested 10 digoxin tablets D. 2:1 A-V block with occasional ventricular extrasystoles

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Last Answer : B. Pulsus bigeminus with heart rate 110/min in a patient on maintenance digoxin therapy

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Last Answer : a) Persistent cough Persistent cough may indicate an onset of left-heart failure.

Atropine is contraindicated in (a) Cyclic AMP (b) Inositol trisphosphate (c) Diacyl glycerols (d) G protein

Description : Atropine is contraindicated in (a) Cyclic AMP (b) Inositol trisphosphate (c) Diacyl glycerols (d) G protein

Last Answer : Ans: D

Which of the following mydriatics has the fastest and briefest action ? (a) Atropine (b) Homatropine (c) Tropicamide (d) Cyclopentolate

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Which of the following effects of epinephrine would be blocked by phentolamine but not by metoprolol ? (a) Cardiac stimulation (b) Contractionof radial smooth muscle in the iris (c) Increase of camp in fat (d) Relaxation of bronchial smooth muscle (e) Relaxation of the uterus

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Last Answer : Ans: E

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Last Answer : Ans: B

The dose of digoxin in congestive heart failure is adjusted by monitoring: A. Electrocardiogram B. Heart rate and symptoms of CHF C. Blood pressure D. Plasma digoxin levels

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Last Answer : B. Heart rate and symptoms of CH

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Last Answer : Ans: A

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Last Answer : decrease O2 supply to the muscle

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Last Answer : Ans: B