MRCP2-0152

MRCP2-0152

A 75-year-old man was admitted to the hospital after experiencing sudden shortness of breath at 2 am. He reported a gradual increase in difficulty breathing over the past few months and found that sleeping in a chair helped alleviate his symptoms. The following are his oxygen saturation levels and pressure readings at various anatomical sites:

– Superior vena cava: 76% saturation, no pressure reading
– Inferior vena cava: 72% saturation, no pressure reading
– Right atrium (mean): 74% saturation, 9 mmHg pressure
– Right ventricle: 75% saturation, 60/8 mmHg pressure
– Pulmonary artery: 74% saturation, 58/26 mmHg pressure
– Pulmonary capillary wedge pressure: 30 mmHg
– Left ventricle: 98% saturation, 150/25 mmHg pressure
– Aorta: 97% saturation, 150/44 mmHg pressure

What is the most likely diagnosis?