A 65-year-old woman suddenly developed a severe episode of dyspnea after physical exertion (quickly climbing the stairs). She has history of a myocardial infarction that occurred 8 years ago. Objectively, the following is observed: heart rate 112/min, blood pressure 170/110 mm Hg, respiratory rate 25/min. Auscultation detects arrhythmic cardiac activity, frequent extrasystole, severely weakened heart sounds, systolic murmur at the apex, weakened respiration and wet non-homogeneous crackles in the lower segments. What treatment regimen would be optimal in this case?