Soru

An urgent care clinic evaluates a $74$-year-old male who reports four days of worsening shortness of breath and a persistent dry cough. He notes that lying flat in bed induces a feeling of suffocation, forcing him to sleep in a recliner for the past two nights. His medical history is notable for a myocardial infarction three years ago, essential hypertension, hyperlipidemia, and a $45$-pack-year smoking history. Current medications include aspirin, lisinopril, and atorvastatin. Vital signs show a temperature of $37.1^\circ\text{C}$ ($98.8^\circ\text{F}$), blood pressure of $158/92\text{ mm Hg}$, pulse of $112\text{/min}$, and respiratory rate of $24\text{/min}$. Pulse oximetry is $89\%$ on room air. The patient appears anxious and is using accessory muscles of respiration. Examination of the neck shows distention of the jugular veins when seated at a $45^\circ$ angle. Pulmonary auscultation reveals diffuse expiratory wheezing and bibasilar crackles. Cardiac auscultation reveals a regular tachycardia with a low-pitched extra heart sound heard shortly after $\text{S}_2$. There is $1+$ pitting edema of the lower extremities bilaterally. Which of the following is the most appropriate initial pharmacological intervention for this patient?