Pregunta 1
Pregunta
Quinidine is principally used to treat
Pregunta 2
Pregunta
Quinidine is used to treat
Pregunta 3
Pregunta
Verapamil is most efficacious in the treatment of
Pregunta 4
Pregunta
Which of the following drugs is most useful in treating or preventing angina pectoris?
Respuesta
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a. Digitalis
-
b. Quinidine
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c. Propranolol
-
d. Procainamide
-
e. Pentobarbital
Pregunta 5
Pregunta
Each of the following drugs can be used in the prevention and treatment of angina pectoris EXCEPT
Pregunta 6
Pregunta
All of the following drugs are useful in the treatment of hypertension EXCEPT
Respuesta
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a. Ephedrine
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b. Reserpine
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c. Methyldopa
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d. Thiazide diuretics
Pregunta 7
Pregunta
Digitalis is useful in the treatment of which of the following conditions?
Pregunta 8
Pregunta
All of the following drugs are useful in the treatment of cardiac arrhythmias EXCEPT
Respuesta
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a. Digitalis
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b. Lidocaine
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c. Phenytoin
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d. Procainamide
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e. Aminophylline
Pregunta 9
Pregunta
The drug of choice for initial therapy for mild hypertension is
Respuesta
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a. Reserpine
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b. Guanethidine
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c. Phenobarbital
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d. Chlorothiazide
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e. Alpha-methyldopa
Pregunta 10
Pregunta
Which of the following antihypertensives are usually reserved for treatment of severe hypertension?
Respuesta
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a. Sedatives and reserpine
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b. Thiazide diuretics and reserpine
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c. Sedatives and thiazide diuretics
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d. Guanethidine and ganglionic blocking agents
Pregunta 11
Pregunta
Which of the following beta-adrenergic receptor blocking agents is thought to be cardioselective?
Respuesta
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a. Nadolol
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b. Timolol
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c. Metoprolol
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d. Propranolol
Pregunta 12
Pregunta
Antiarrhythmic drugs, such as quinidine, suppress certain cardiac arrhythmias by
Respuesta
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a. Stimulating the beta-adrenergic receptor
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b. Suppressing cardiac ATP-ase activity
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c. Increasing ectopic pacemaker activity
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d. Increasing the refractory period of cardiac muscle
Pregunta 13
Pregunta
Most drugs useful in the treatment of cardiac arrhythmias act primarily by
Respuesta
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a. Blocking Purkinje fibers
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b. Blocking the alpha-adrenergic receptor
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c. Suppressing SA node impulse formation
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d. Causing a positive inotropic effect
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e. Increasing the refractory period of cardiac muscle
Pregunta 14
Pregunta
The most important pharmacologic action of drugs that suppress cardiac arrhythmias is
Respuesta
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a. Blockade of the vagus nerve
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b. Stimulation of cardiac ATP-ase activity
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c. Blockade of the Beta-adrenergic receptor
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d. Stimulation of the beta-adrenergic receptor
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e. Increased refractory period of cardiac muscle
Pregunta 15
Pregunta
Lidocaine produces its antiarrhythmic effects by
Respuesta
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a. Increasing AV conduction
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b. Decreasing cardiac excitability
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c. Increasing cardiac conduction velocity
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d. Increasing spontaneous pacemaker activity
Pregunta 16
Pregunta
When digitalis is used in atrial fibrillation, the therapeutic objective is to
Respuesta
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a. Abolish cardiac decompensation
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b. Inhibit vagal impulses to the heart
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c. Decrease the rate of A-V conduction
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d. Increase the rate of cardiac repolarization
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e. Produce a decrease in the rate of atrial contraction
Pregunta 17
Pregunta
Nitroglycerin dilates the coronary arteries in angina pectoris by
Respuesta
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a. Decreasing the heart rate reflexly
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b. Increasing the metabolic work of the myocardium
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c. Direct action on smooth muscle in the vessel walls
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d. Increasing the effective refractory period in the atrium
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e. Blocking beta-adrenergic receptors
Pregunta 18
Pregunta
Propranolol is of value in treating angina pectoris because it
Respuesta
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a. Has a direct action on vascular smooth muscle
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b. Blocks autoregulatory mechanisms in the heart
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c. Inhibits oxygen metabolism in cardiac cells
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d. Provides relief within seconds of an acute anginal attack
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e. Prevents chronotropic responses to endogenous epinephrine emotions and exercise
Pregunta 19
Pregunta
Administration of angiotensin results in
Respuesta
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a. Anti-inflammatory effects
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b. Antihistaminic effects
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c. Increased blood pressure
-
d. Increased heart rate
-
e. A sedative effect
Pregunta 20
Pregunta
The primary antihypertensive effect of captopril (Capoten) is due to accumulation of
Pregunta 21
Pregunta
Administration of angiotensin results in
Respuesta
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a. A sedative effect
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b. Increased heart rate
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c. Increased blood pressure
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d. Antihistaminic effects
-
e. Anti-inflammatory effects
Pregunta 22
Pregunta
Which of the following is NOT characteristic of the thiazide diuretics?
Respuesta
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a. Increase renal excretion of sodium and chloride
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b. Increase renal excretion of potassium
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c. Increase the toxicity of digitalis
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d. Exacerbate existing diabetes
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e. Cause hypokalemia
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f. Cause hypoglycemia
Pregunta 23
Pregunta
The most useful diuretic drugs act by
Respuesta
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a. Increasing the glomerular filtration rate
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b. Decreasing the renal reabsorption of sodium
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c. Decreasing the renal excretion of chloride
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d. Increasing the renal reabsorption of potassium
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e. Increasing the secretion of antidiuretic hormone
Pregunta 24
Pregunta
Which of the following drugs act by inhibiting renal reabsorption of sodium?
Respuesta
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a. Urea
-
b. Chlorothiazide
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c. Theophylline
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d. digitalis glycosides
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e. Procainamide
Pregunta 25
Pregunta
Digoxin exerts its positive inotropic effect by
Respuesta
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a. Activation of adenylcyclase
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b. Inhibition of phosphodiesterase
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c. An agonist effect of beta-receptors
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d. Inhibition of Na+, K+ ATPASE leading to increased calcium influx
-
e. Decreasing the amount of calcium available for excitationcontraction coupling
Pregunta 26
Pregunta
Digitoxin is effective in the treatment of cardiac failure because it
Respuesta
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a. Is primarily a diuretic
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b. Reduces the ventricular rate
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c. Decreases abnormal cardiac rhythms
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d. Produces peripheral vasoconstriction
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e. Has a positive cardiac inotropic action
Pregunta 27
Pregunta
The primary action of therapeutic doses of digitalis on cardiac muscle is an increase in
Respuesta
-
a. Force of contraction
-
b. Ventricular excitability
-
c. Refractory period of the atrial muscle
-
d. Refractory period of the ventricular muscle
-
e. Rate of conduction of impulse to the muscle
Pregunta 28
Pregunta
The beneficial effects of digitalis in congestive heart failure result in part from the fact that digitalis causes
a. A decrease in end-diastolic volume
b. A decrease in end-diastolic pressure
c. An increase in stroke volume and cardiac output
d. A decrease in central venous pressure
e. A decrease in rate of the hear where tachycardia exists
Respuesta
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a) (a), (b) and (c)
-
b) (a) and (c) only
-
c) (c) and (d)
-
d) (e) only
-
e) All of the above
Pregunta 29
Pregunta
The cardiac glycosides will increase the concentration of which ion in an active heart muscle?
Respuesta
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a. Sodium
-
b. Bromide
-
c. Calcium
-
d. Chloride
-
e. Potassium
Pregunta 30
Pregunta
Which of the following ions augments the inotropic effect of digitalis?
Respuesta
-
a. Sodium
-
b. Lithium
-
c. Calcium
-
d. Chloride
-
e. Magnesium
Pregunta 31
Pregunta
In the treatment of congestive heart failure, digitalis glycosides generally decrease all of the following EXCEPT
Pregunta 32
Pregunta
The mechanism of action of prazosin, an antihypertensive agent is to
Respuesta
-
a. Block beta-adrenergic receptors
-
b. Inhibit formation of angiotensin II
-
c. Inhibit nerve-induced release of norepinephrine
-
d. Stimulate central inhibitory alpha-adrenergic receptors
-
e. Inhibit the postsynaptic of norepinephrine on vascular smooth muscle
Pregunta 33
Pregunta
Which of the following owes a significant amount of its antihypertensive effect to a central action?
Respuesta
-
a. Methyldopa
-
b. Metoprolol
-
c. Hydralazine
-
d. Propranolol
-
e. Guanethidine
Pregunta 34
Pregunta
Which of the following drugs is thought to reduce arterial blood pressure by activating alpha receptors in the vasomotor center of the medulla?
Respuesta
-
a. Prazosin
-
b. Clonidine
-
c. Propranolol
-
d. Guanethidine
-
e. Chlorothiazide
Pregunta 35
Pregunta
Propranolol (Inderal) can be useful in the treatment of hypertension because it blocks
Respuesta
-
a) (a) and (b)
-
b) (a) and (d)
-
c) (b), (c) and (d)
-
d) (c), (d) and (e)
-
e) (c) and (e) only
Pregunta 36
Pregunta
One of the proposed mechanisms of the antihypertensive effect of beta-adrenergic receptor blocking agents is
Pregunta 37
Pregunta
Selective beta-1 adrenergic agonists will produce which of the following effects?
Respuesta
-
a. Glycogenolysis
-
b. Increased cardiac output
-
c. Decreased diastolic pressure
-
d. Decreased peripheral resistance
-
e. Relaxation of bronchial smooth muscle
Pregunta 38
Pregunta
Ototoxicity with deafness may encountered occasionally in patients taking which of the following diuretic agents?
Respuesta
-
a. Osmotic
-
b. Thiazide
-
c. Mercurial
-
d. High-ceiling
Pregunta 39
Pregunta
Ototoxicity with deafness may encountered occasionally in patients taking which of the following diuretic agents?
Respuesta
-
a. Osmotic
-
b. Thiazide
-
c. Mercurial
-
d. High-ceiling
Pregunta 40
Pregunta
Symptoms of digitalis toxicity include all of the following EXCEPT
Respuesta
-
a. Extrasystoles
-
b. Nausea and vomiting
-
c. Yellow-green vision
-
d. A-V conduction block
-
d. Chlorothiazide
-
e. Acetylsalicylic acid