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Figure 3 | Journal of Cardiovascular Magnetic Resonance

Figure 3

From: Evaluation of diastolic function by three-dimensional volume tracking of the mitral annulus with cardiovascular magnetic resonance: comparison with tissue Doppler imaging

Figure 3

Mitral annulus sweep volume curve and associated diastolic parameters. (A) Representative 3D models of MA sweep volumes at different phases of the cardiac cycle. (B) Representative MA sweep volume (upper) and sweep rate (lower) profiles from a subject with normal diastolic function. Both curves were normalized to end-systolic sweep volume (ESSV). Cardiac intervals were identified based on the transitions in slope of the sweep volume curve, distinguishing systole, early diastole, mid-diastole, and atrial systole (AS). 50% diastolic sweep volume recovery time (DSVRT50) was measured as the time required in diastole for the MA to recover 50% of ESSV, and was adjusted for RR interval. Normalized peak sweep rates in early diastole (PSRE) and atrial systole (PSRA) are shown in the sweep rate curve. Sweep volume acceleration time (ATSV) was measured from onset of early diastole to the time of PSRE, and sweep volume deceleration time (DTSV) was measured by linear extrapolation of PSRE to baseline.

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