Isolated right ventricular dysfunction in systemic sclerosis: latent pulmonary hypertension?

Area of Science:

• Cardiology
• Rheumatology
• Pulmonary Medicine

Background:

• Right ventricular (RV) dysfunction is common in systemic sclerosis (SSc).
• The link between RV dysfunction and pulmonary vascular complications in SSc remains unclear.
• Early detection of RV diastolic dysfunction is crucial for managing SSc patients.

Purpose of the Study:

• To investigate right ventricular function and pulmonary circulation in SSc patients.
• To determine if latent pulmonary hypertension contributes to RV diastolic dysfunction.
• To evaluate the utility of stress echocardiography and tissue Doppler imaging (TDI) in SSc.

Main Methods:

• Standard echocardiography with TDI performed at rest and during exercise.
• Study included 25 SSc patients and 13 age-matched healthy controls.
• Assessed RV function, pulmonary circulation, and exercise capacity.

Main Results:

• SSc patients exhibited decreased pulmonary flow acceleration time and increased RV wall thickness and end-diastolic dimensions compared to controls.
• Tricuspid annulus E maximal velocity was decreased, and isovolumic relaxation time was increased in SSc patients.
• Stress echocardiography showed increased pulmonary artery pressure/flow relationships during exercise, suggesting latent pulmonary hypertension.

Conclusions:

• Systemic sclerosis patients may have subclinical pulmonary hypertension.
• Latent pulmonary hypertension is a likely cause of right ventricular diastolic dysfunction in SSc.
• Stress echocardiography and TDI are valuable tools for detecting RV diastolic dysfunction in SSc.