A patient is admitted with suspected cardiomyopathy. What diagnostic test would be most helpful with the identification of this disorder?

A. Rheumatoid arthritis is an autoimmune disease that is not directly related to Group A streptococcal pharyngitis.
B. Nausea and vomiting are common symptoms of Group A streptococcal pharyngitis, but they are not the most serious complication.
C. A serious complication of untreated Group A streptococcal pharyngitis, rheumatic fever can cause inflammation of the heart, joints, skin, and brain. With prompt antibiotic treatment, the risk of developing rheumatic fever can be significantly reduced.
D. Fatigue and malaise are common symptoms of many illnesses, including Group A streptococcal pharyngitis. However, the most serious complication of untreated Group A streptococcal pharyngitis is rheumatic fever.

A. Left ventricular hypertrophy (LVH) refers to the thickening of the walls of the left ventricle, which often results from chronic high blood pressure or other conditions that increase the workload on the heart. While LVH is an important cardiac issue, it is not a direct complication of pericarditis.
B. Increased cardiac output (the volume of blood the heart pumps per minute) is generally not a direct complication of pericarditis. In fact, pericarditis often affects cardiac output in a different way.
C. Cardiac tamponade is a serious and potentially life-threatening complication of pericarditis. It occurs when fluid accumulates in the pericardial space, exerting pressure on the heart and impeding its ability to fill and pump effectively. This condition can lead to reduced cardiac output, hypotension, and symptoms of shock.
D. Hypertension (high blood pressure) is a common condition that can contribute to a range of cardiovascular issues, but it is not a direct complication of pericarditis.