Diagnostic-studies-aortic-regurgitation

• ECG: can see LVH, LAD, abnl repol; CXR: cardiomegaly ± ascending Ao dilatation
• Echo: severity of AR (severe = regurg jet width ≥65% LVOT, regurg fraction ≥50%, effective regurg orifice ≥0.3 cm2, holodiastolic flow reversal in descend. Ao; moderate = jet width 25–64%, regurg fraction 30–49%, regurg orifice 0.1–0.29 cm2); LV size & fxn