Clinical and genetic associations of deep learning-derived cardiac magnetic resonance-based left ventricular mass

Authors:

Abstract
Left ventricular mass is a risk marker for cardiovascular events, and may indicate an underlying cardiomyopathy. Cardiac magnetic resonance is the gold-standard for left ventricular mass estimation, but is challenging to obtain at scale. Here, we use deep learning to enable genome-wide association study of cardiac magnetic resonance-derived left ventricular mass indexed to body surface area within 43,230 UK Biobank participants. We identify 12 genome-wide associations (1 known at TTN and 11 novel for left ventricular mass), implicating genes previously associated with cardiac contractility and cardiomyopathy. Cardiac magnetic resonance-derived indexed left ventricular mass is associated with incident dilated and hypertrophic cardiomyopathies, and implantable cardioverter-defibrillator implant. An indexed left ventricular mass polygenic risk score ≥90th percentile is also associated with incident implantable cardioverter-defibrillator implant in separate UK Biobank (hazard ratio 1.22, 95% CI 1.05-1.44) and Mass General Brigham (hazard ratio 1.75, 95% CI 1.12-2.74) samples. Here, we perform a genome-wide association study of cardiac magnetic resonance-derived indexed left ventricular mass to identify 11 novel variants and demonstrate that cardiac magnetic resonance-derived and genetically predicted indexed left ventricular mass are associated with incident cardiomyopathy.
Funding Information
  • John S. LaDue Memorial Fellowship
  • U.S. Department of Health & Human Services | NIH | National Heart, Lung, and Blood Institute (1R01HL139731, T32HL007604, R01HL134893, R01HL140224, 1R01HL092577, R01HL128914, K24HL105780, 1R01HL139731)
  • American Heart Association (18SFRN34110082, 18SFRN34110082, 18SFRN34250007)
  • NIH NHLBI BioData Catalyst Fellows Program
  • U.S. Department of Health & Human Services | NIH | National Heart, Lung, and Blood Institute
  • U.S. Department of Health & Human Services | NIH | National Heart, Lung, and Blood Institute
  • U.S. Department of Health & Human Services | NIH | National Heart, Lung, and Blood Institute
  • U.S. Department of Health & Human Services | NIH | National Heart, Lung, and Blood Institute
  • U.S. Department of Health & Human Services | NIH | National Heart, Lung, and Blood Institute
  • U.S. Department of Health & Human Services | NIH | National Heart, Lung, and Blood Institute
  • U.S. Department of Health & Human Services | NIH | National Heart, Lung, and Blood Institute

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