Diastolic time – frequency relation in the stress echo lab: filling timing and flow at different heart rates

Table 4 Mitral filling volume and diastolic filling rate

	EXERCISE		DIP		PACING
Pt n°	64		32		6
Age (years)	57 ± 13	Δ	66 ± 11		68 ± 10
Gender (M/F)	44/20		20/12		4/2
HR rest (bpm)	70 ± 14		67 ± 12		71 ± 10
HR peak (bpm)	129 ± 22	Δ	85 ± 13	*	132 ± 13
Diastolic time rest (msec)	531 ± 148	Δ	623 ± 135		600 ± 108
Diastolic time peak (msec)	245 ± 58	Δ	377 ± 87	*	211 ± 48
Mitral filling volume rest (= stroke volume index rest), ml/m²	28 ± 7		30 ± 7		35 ± 9
Mitral filling volume peak (= stroke volume index peak), ml/m²	30 ± 8	‡	33 ± 9	*	21 ± 6
diastolic filling rate rest (= mitral filling volume/diastolic time * 1,000), ml/m² * s ^-1	105 ± 36		90 ± 26		117 ± 57
diastolic filling rate peak (= mitral filling volume/diastolic time1,000), ml/m² s ^-1	248 ± 95	Δ	164 ± 60		191 ± 58
Cardiac index rest (ml/m² * min)	1915 ± 605		1987 ± 4922		2473 ± 709
Cardiac index peak (ml/m² * min)	3883 ± 1176	§	2783 ± 913		2745 ± 767

§= significant differences between exercise and both dipyridamole and pacing stress pts; ‡ = significant differences between exercise and pacing stress pts; * = significant differences between dipyridamole and pacing stress pts; Δ = significant differences between exercise and dipyridamole stress pts.

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