One week ago, a 68-year-old woman suddenly developed pain in the left half of her chest and shortness of breath. Objectively. the following is observed: cyanosis, distended neck veins, pulse- 100 /min, blood pressure –110/70 mm Hg, respiratory rate-28 /min., liver +4 cm, the left lower leg is edematous and sharply painful to palpation Auscultation detects a dull lung sound on the left, below the scapula; sonorous moist fine vesicular crackles are present; the borders of the heart are expanded on the right, the II heart sound is accentuated over the pulmonary artery. ECG shows deep S waves in leads I and aVL well as deep Q waves in leads III and aVE and a negative T wave in leads III and aVE What is the most likely diagnosis in this case?