Mitral stenosis can be treated in several ways to relieve the obstruction and restore valve function, chosen based on the valve’s anatomy and the patient’s situation. Valvuloplasty, whether done percutaneously or surgically, dilates the stenotic mitral orifice by separating fused commissures and thinning or splitting fused leaflets, which is particularly effective when the valve is pliable and not heavily calcified. If the valve anatomy is favorable and the tissue can be repaired rather than replaced, mitral valve repair aims to restore normal leaflet motion and proper valve competence, sometimes addressing any accompanying regurgitation while preserving the native valve. When the valve is too damaged, calcified, or otherwise not amenable to durable repair, mitral valve replacement is performed, substituting a prosthetic valve to guarantee unobstructed flow. Because each of these approaches can be used depending on specific valve pathology, all three—valvuloplasty, repair, and replacement—are valid treatments for valvular mitral stenosis.

Calcific aortic stenosis creates chronic pressure overload on the left ventricle. The heart adapts by developing concentric LV hypertrophy, thickening the walls to generate the higher systolic pressure needed to pump across the narrowed valve. On 2D echocardiography this appears as increased LV wall thickness and LV mass, often with a preserved ejection fraction in the earlier stages. Left atrial enlargement can occur if diastolic pressures rise over time, but it is not the classic secondary finding. Therefore LVH is the most characteristic secondary 2D finding in calcific aortic stenosis.

Differentiating chronic from acute aortic regurgitation on color and Doppler rests on how the regurgitant flow behaves diastolically and how LV filling pressures modify the jet. In chronic AR the regurgitant jet often shows a steeper deceleration slope on spectral Doppler, and the Doppler envelope can appear triangular rather than the classic box shape. The pressure half-time (PHT) method remains useful for gauging regurgitation severity in chronic cases. In contrast, acute AR features a sudden volume overload with rapidly rising LV diastolic pressures, which tends to shorten the mitral inflow deceleration time, seen as a shortened E-wave deceleration time on MV Doppler. Color flow imaging continues to help gauge jet dimensions, but the key differentiators are the diastolic jet morphology and the timing changes in mitral inflow. So the statement that explicitly pairs chronic AR with steep deceleration slope and triangular Doppler signal, includes the PHT method, notes the acute AR association with shortened MV deceleration time, and acknowledges the role of color flow in jet sizing, best captures the contrast between chronic and acute AR. The other options rely on features that are not consistent or sufficient to distinguish the two states.

Severe tricuspid regurgitation raises right atrial pressure during systole because blood leaks back from the right ventricle into the atrium. This high systolic RA pressure is transmitted backward into the hepatic veins, which drain directly into the RA area, causing a retrograde flow during systole on Doppler. The hepatic veins therefore show systolic flow reversal, a classic sign of severe TR. The portal vein tends to become more pulsatile with elevated right-sided pressures but does not typically reverse its flow; renal and internal jugular vein patterns can be abnormal too, but reversal in the hepatic veins is the most characteristic and reliable finding.