During a cardiac assessment on a 38-year-old patient in the…

During a cardiac assessment on a 38-year-old patient in the hospital for “chest pain,” the nurse finds the following: jugular vein pulsations 4 cm above the sternal angle when the patient is elevated at 45 degrees, blood pressure 98/60 mm Hg, heart rate 130 beats per minute, ankle edema, difficulty breathing when supine, and an S3 on auscultation. Which of these conditions best explains the cause of these findings?