Figure 2.

Computed tomography of chest impression of LA in subjects undergoing right heart catheterization for pulmonary hypertension evaluation. Group I, small-normal appearing LA. Group II large appearing LA. In group I, there were 3 subjects with small-normal appearing LA and elevated PCWP with the evidence of left ventricular dysfunction. Normal PCWP defined as equal to or less than 15 mmHg and elevated PCWP as greater than 15 mmHg.

Abbreviations: LA, left atrium; PCWP, pulmonary capillary wedge pressure.