A 77-Year-Old Patient with a History of Coronary Artery Disease $\beta$

Multiple Choice

A 77-year-old patient with a history of coronary artery disease and heart failure has arrived in the emergency room with a rapid heart rate and feeling of "impending doom." Based on pathophysiologic principles, the nurse knows the rapid heart rate could

A) decrease renal perfusion and result in the development of ascites.
B) be a result of catecholamines released from SNS that could increase the myocardial oxygen demand.
C) desensitize the $\beta$ -adrenergic receptors leading to increase in norepinephrine levels.
D) prolong the electrical firing from the SA node resulting in the development of a heart block.