In a patient diagnosed with pheochromocytoma, what is the appropriate preoperative pharmacological management to control hypertension before surgery?
APhenoxybenzamine and propranolol
BPropranolol
CNitroglycerine
DPhentolamine
Effects of beta blockers on the heart are all of the following except:
ADecreases duration of systole
BDecrease in heart rate
CMay decrease cardiac output initially.
DMay precipitate heart failure in acute settings.
Which part of the sympathetic nervous system is responsible for secreting catecholamines?
ACardiac ganglion
BCervical sympathetic chain
CAdrenal medulla
DThoracic sympathetic chain
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