A 54-year-old male with a past medical history of type 2 diabetes mellitus comes to the emergency department complaining of shortness of breath.
His blood pressure is 146/92 mmHg, respiratory rate is 26/min, and oxygen saturation is 87% on room air. Cardiac auscultation findings over the apex are given below. Based on the physical findings, which of the following is the best initial therapy for this patient?
A. Inhaled bronchodilators
B. Intravenous beta-blockers
C. Intravenous diltiazem
D. Intravenous diuretics
E. Pericardiocentesis