Racial Differences of Cardiac Structure and Function in Heart Failure With Preserved Ejection Fraction

Abstract

Potential race differences in cardiac structure and function among patients with heart failure with preserved ejection fraction (HFpEF) are not well-understood, but may have pathophysiological and treatment implications. In this study, patients with HFpEF who self-identified as Asian (n = 360), White (n = 787), and Black (n = 171) from 3 institutions underwent comprehensive transthoracic echocardiography to evaluate for potential differences. The Asian HFpEF group was oldest and the Black HFpEF group was youngest (75 ± 12 years vs 73 ± 13 years vs 62 ± 12 years; P < .0001). Women constituted the lowest proportion of patients with HFpEF among Asian individuals, but were the largest among Black patients (49% vs 56% vs 73%; P < .0001). Body mass index and obesity prevalence were highest in Black patients with HFpEF and were lowest in Asian patients. Black individuals with HFpEF had greater left ventricular (LV) wall thickening and concentricity, smaller LV chamber size, leftward-shifted LV end-diastolic pressure-volume relationship, indicating greater LV stiffening, smallest left atrial volumes, and the most right ventricular dilatation. Asian individuals with HFpEF had greater LV and left atrial dilation, more rightward shifted LV end-diastolic pressure-volume relationship, and the highest arterial stiffness. In summary, we show that patients with HFpEF of Asian, Black, and White race display key differences in clinical, anthropometric, and cardiac structure-function indices, indicating that consideration of race-related differences might important to individualize treatment strategies in HFpEF.