| Summary: | Both Transthoracic echocardiography (TTE) and cardiac magnetic resonance (CMR)
have well-established role in mitral regurgitation (MR) quantification for
optimal management strategy. We assessed the correlation between TTE and CMR in
the quantification of MR. Participants with isolated MR and echocardiographic
mitral regurgitant volume (RVol) ≥ 30 mL/beat were included. A consecutive
sample of 30 participants (Mean age 52.7 ± 19.3 years, 50% males) was
selected and referred for indirect and direct CMR quantification of mitral RVol.
There was a statistically significant strong positive correlation between the
echocardiographic and indirect CMR quantification of the mitral RVol (r = 0.753,
P < 0.001) and a statistically significant moderate positive
correlation between the echocardiographic and direct CMR quantification of the
mitral RVol (r = 0.530, P < 0.003). The inter-observer reliability of
the MR grade between TTE and CMR showed a statistically significant moderate
agreement (κ = 0.502, P = 0.0001) when the observers used the
echocardiographic mitral RVol for grading of MR. On the other hand, the
inter-observer reliability of the MR grade between TTE and CMR showed a
statistically significant faint agreement (κ = 0.251, P =
0.024) when the observers used the echocardiographic regurgitant fraction (RF)
for grading of MR. The positive reciprocal relationship between the CMR and the
TTE highlights the potential role of the CMR as a concomitant imaging tool for
quantification of the mitral RVol and grading of isolated MR, especially with
limited or inconclusive TTE studies. This will enhance the management strategy
and improve outcomes.
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