68 yo woman presents to the ER with the acute onset of mild aphasia, mild pronator drift on the right, and mild right-sided facial weakness. BP 195/90 mm Hg.

Correct Answer: D

Rationale: Before initiating thrombolytic therapy, it's critical to confirm the diagnosis with a CT scan and check glucose levels to exclude hypoglycemia.

Correct Answer: D

Rationale: Hemoptysis, pneumothorax, and extensive pulmonary destruction are all recognized pulmonary complications of tuberculosis, making 'All of the above' correct.

Correct Answer: C

Rationale: Untreated obstructive sleep apnea (OSA) is well-documented to increase perioperative risks, including respiratory and cardiovascular complications, due to airway obstruction and hypoxemia. This is supported by extensive literature, including ASA guidelines, making this the correct statement.

Correct Answer: B

Rationale: Lusitropic impairment refers to an energy-requiring process that removes free calcium ions from the cytoplasm by pumping them back into the sarcoplasmic reticulum and across the cell membrane into the extracellular fluid. Ischemia interferes with this process in the active phase of diastolic relaxation. Poor contractile force is not associated with lusitropic impairment. The conduction rate is not associated with the energy-requiring process known as lusitropy. Automaticity is not a factor in lusitropy.

Correct Answer: B

Rationale: Dysrhythmias can be indicative of an underlying pathophysiologic disorder. Dysrhythmias can impair normal cardiac output and lead to serious patient complications. Dysrhythmias are not an indicator of life span, but they may certainly shorten a patient's life span. Dysrhythmias do not impair venous return, but they do impair cardiac output. Alone, dysrhythmias do not increase the severity of heart murmurs.