Table 4.

Impact of PTMC on PA′ intervals, inter- and intra-atrial electromechanical delays.

Parameter	Pre-PTMC (mean ± SD)	Post-PTMC (mean ± SD)	Difference (mean)	p-Value
$\text{P}{{\text{A}}^{\prime }}_{\text{septal}}(\text{ms})$	44.96 ± 5.57	42.08 ± 5.67	2.88	<0.001
$\text{P}{{\text{A}}^{\prime }}_{\text{lateral}}(\text{ms})$	106.24 ± 18.48	89.28 ± 15.00	16.96	<0.001
$\text{P}{{\text{A}}^{\prime }}_{\text{tricuspid}}(\text{ms})$	32.48 ± 4.81	31.36 ± 4.72	1.12	0.016
AEMD (ms)	73.76 ± 15.67	57.92 ± 11.73	15.84	<0.001
R-IAEMD (ms)	12.48 ± 2.66	10.72 ± 2.51	1.76	<0.001
L-IAEMD (ms)	61.28 ± 14.27	47.20 ± 10.89	14.08	<0.001

Note: $\text{P}{{\text{A}}^{\prime }}_{\text{septal}},{\text{\hspace{0.28em}PA}}^{\prime }\text{interval at septal mitral annulus};\text{P}{{\text{A}}^{\prime }}_{\text{lateral}}{\text{,\hspace{0.28em}PA}}^{\prime }\text{interval at lateral mitral annulus};\text{P}{{\text{A}}^{\prime }}_{\text{tricuspid}}{\text{,\hspace{0.28em}PA}}^{\prime }\text{interval at tricuspid annulus};$ AEMD, atrial electromechanical delay; R-IAEMD, right intra-atrial electromechanical delay; L-IAEMD, left intra-atrial electromechanical delay. Bold entries represent significant p values.