MRI Assessment of Diastolic Dysfunction in People Living With the Human Immunodeficiency Virus: Correlation With Markers of Disease Activity.

ABSTRACT

BACKGROUND: Despite the advent of combination antiretroviral therapy, people living with human immunodeficiency virus (PLWH) are at an increased risk for cardiac disease. PURPOSE: To explore the presence and extent of diastolic atrial and left ventricular dysfunction in PLWH using cardiac MRI in correlation with clinical markers of disease activity. STUDY TYPE Prospective. POPULATION A total of 163 participants comprising 101 HIV-infected individuals (age 52 years [42-62 years]; 92% male) and 62 age- and sex-matched healthy volunteers (age 51 years [30-72 years]; 85% male). FIELD STRENGTH/SEQUENCE 3.0 T, cardiac MRI including balanced steady-state free precession (SSFP) for the short-axis, two-, three-, and four-chamber views were performed. ASSESSMENT Assessment of cardiac function and strain analysis were accomplished by CVI42 software. Blood samples for CD4+ T cells and cardiac risk factors were also collected before MRI. STATISTICAL TESTS Independent t tests, Mann-Whitney U test, Pearson's correlation analysis, and multivariate linear analyses (significance level P < 0.05). RESULTS: PLWH had a significantly larger left atrial volume maximum index (LAVImax 32.6 ± 8.7 vs. 28.7 ± 8.1 mL/m2), minimum (LAVImin 14.8 ± 5.5 vs. 11.5 ± 5.4 mL/m2,), and prior to atrial contraction (LAVIpre-a 23.4 ± 6.7 vs. 19.7 ± 7.2 mL/m2) as compared to healthy volunteers. The LA reservoir (LAtEF 55.0 ± 10.2 vs. 61.4 ± 10.4; Sls 29.0 ± 8.1 vs. 33.8 ± 11.8), conduit (LApEF 28.4 ± 8.2 vs. 32.3 ± 11.3, P = 0.01; Sle 16.3 ± 6.5 vs. 18.9 ± 8.2), and booster pump function (LAaEF 37.4 ± 12.4 vs. 42.7 ± 13.1, P = 0.01, Sla 12.7 ± 5.1 vs. 14.9 ± 5.7) were all significant impaired in PLWH. Global circumferential left ventricular diastolic strain rate (LVGCS-d) was significantly lower in the HIV patients. Multivariate analysis results showed that Nadir CD4+ T cells had a significant adverse association with LVGCS-d (ß = 0.51). CONCLUSION: LA structure abnormalities and LV diastolic dysfunction were manifested in PLWH, with Nadir CD4+ T cell counts potentially serving as a risk factor for early cardiac diastolic dysfunction. LEVEL OF EVIDENCE 2 TECHNICAL EFFICACY Stage 3.