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Myocardial performance index is associated with cardiac computed tomography findings in patients with suspected coronary artery disease
Author(s) -
Olsen Flemming Javier,
Lassen Mats Christian Højbjerg,
Brainin Philip,
Bech Jan,
Alhakak Alia Saed,
Pedersen Sune,
Claggett Brian,
FritzHansen Thomas,
Folke Fredrik,
Gislason Gunnar H.,
BieringSørensen Tor
Publication year - 2020
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/echo.14897
Subject(s) - medicine , cardiology , coronary artery disease , ejection fraction , body mass index , dyslipidemia , artery , odds ratio , diabetes mellitus , heart failure , disease , endocrinology
Background Studies suggest cardiac time intervals to be associated with cardiac ischemia. A novel method to assess cardiac time intervals by tissue Doppler echocardiography has been proposed. Cardiac time intervals can assess the myocardial performance index (MPI), which quantifies the proportion of time spent contributing effective myocardial work. We hypothesized that MPI associates with coronary artery lesions detected by cardiac computed tomography (CT) in patients suspected of coronary artery disease (CAD). Methods We investigated patients referred for cardiac CT under suspicion of CAD who had an echocardiogram performed. Curved m‐mode tissue Doppler imaging was used to measure cardiac time intervals and MPI. The outcome was coronary artery lesions, defined as a calcium score > 400 and/or coronary artery stenosis (>70% luminal narrowing). Logistic regression was applied with multivariable models including: (a) SCORE chart risk factors and (b) SCORE chart risk factors, body mass index, dyslipidemia, familial history of CAD, diabetes mellitus, LVEF, and left ventricular mass index. Results Of 404 patients, 41 (10%) had a coronary artery lesion. Overall, 42% were male, mean age was 58 years, and LVEF was 58%. Patients with coronary artery lesions exhibited higher MPI than those without (0.52 vs. 0.44, P < .001). MPI associated with coronary artery lesions in unadjusted analyses (OR = 1.69 [1.30–2.19], per 0.1 increase), and this association persisted when adjusted for SCORE chart risk factors (OR = 1.55 [1.16–2.07], P = .003, per 0.1 increase), and additional risk factors (OR = 1.64 [1.11–2.41], P = .013, per 0.1 increase). Conclusion Curved m‐mode‐derived MPI is associated with coronary artery lesions detected by cardiac CT in suspected CAD patients.