Phenotypic patterns of right ventricular dysfunction: analysis by cardiac magnetic imaging.

Area of Science:

• Cardiology
• Radiology
• Pathophysiology

Background:

• The left ventricle (LV) is traditionally the focus of cardiac research, leading to limited understanding of right ventricle (RV) remodeling and function.
• Right ventricular dysfunction (RVD) encompasses abnormalities like depressed function, dilatation, or hypertrophy, significantly impacting overall cardiac health.

Purpose of the Study:

• To classify morphological changes and remodeling of the right ventricle (RV) in various clinical scenarios using cardiac magnetic resonance imaging (MRI).
• To analyze the impact of these RV changes on RV function and understand RV pathophysiology.
• To address the gap in literature concerning RV behavior compared to the more studied left ventricle (LV).

Main Methods:

• Retrospective analysis of cardiac MRI scans from 2008-2010, identifying 159 patients with signs of RVD.
• Classification of patients based on RVD criteria (depressed function, dilatation, hypertrophy) and left ventricle dysfunction (LVD).
• Categorization into six pathophysiological patterns based on RV and LV status.

Main Results:

• Six distinct pathophysiological patterns of RV remodeling and dysfunction were identified.
• The most frequent pattern was combined RV and LVD (42.1%), followed by RV volume overload with LVD (32.7%).
• Congenital heart disease was the leading etiology (33.3%), followed by idiopathic dilated cardiomyopathy and left valvular disease.

Conclusions:

• Cardiac MRI effectively classifies diverse RV morphological changes and remodeling patterns in different clinical contexts.
• Understanding these RV patterns and their etiological origins is crucial for comprehending RV pathophysiology.
• This classification aids in better diagnosis and management of conditions affecting the right ventricle.