Cardiac manifestations in polymyositis.

Area of Science:

• Cardiology
• Rheumatology
• Internal Medicine

Background:

• Polymyositis is an idiopathic inflammatory myopathy.
• Cardiac involvement in polymyositis is not well-characterized.

Purpose of the Study:

• To prospectively evaluate cardiac function and abnormalities in polymyositis patients.
• To assess the prevalence of specific cardiac findings like mitral valve prolapse.

Main Methods:

• Prospective study involving 21 polymyositis patients.
• Utilized echocardiography, phonocardiography, and electrocardiography for cardiac assessment.
• Compared findings with a matched control group.

Main Results:

• Enhanced cardiac performance with increased left ventricular ejection phase indexes (P < 0.01).
• Systolic mitral valve prolapse observed in 65% of patients with adequate mitral valve imaging.
• Electrocardiographic abnormalities present in 52% of patients, including conduction disturbances and arrhythmias.

Conclusions:

• Polymyositis patients exhibit enhanced systolic left ventricular function and a high prevalence of mitral valve prolapse.
• Noninvasive cardiac assessment detected abnormalities in 76% of patients, suggesting frequent cardiac involvement.
• The pathophysiology underlying these cardiac findings in polymyositis remains uncertain.