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

Bombardini T, Gemignani V, Bianchini E, Venneri L, Petersen C, Pasanisi E, Pratali L, Alonso-Rodriguez D, Pianelli M, Faita F, Giannoni M, Arpesella G, Picano E - Cardiovasc Ultrasound (2008)

Bottom Line: Diastolic filling rate was calculated as echo-measured mitral filling volume/sensor-monitored diastolic time.Diastolic time decreased during stress more markedly than systolic time.Cardiological systolic and diastolic duration can be monitored during stress by using an acceleration force sensor.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Echocardiography, Institute of Clinical Physiology, National Council of Research, Pisa, Italy. tbombardini@yahoo.it

ABSTRACT

Unlabelled: A cutaneous force-frequency relation recording system based on first heart sound amplitude vibrations has been recently validated. Second heart sound can be simultaneously recorded in order to quantify both systole and diastole duration.

Aims: 1- To assess the feasibility and extra-value of operator-independent, force sensor-based, diastolic time recording during stress.

Methods: We enrolled 161 patients referred for stress echocardiography (exercise 115, dipyridamole 40, pacing 6 patients).The sensor was fastened in the precordial region by a standard ECG electrode. The acceleration signal was converted into digital and recorded together with ECG signal. Both systolic and diastolic times were acquired continuously during stress and were displayed by plotting times vs. heart rate. Diastolic filling rate was calculated as echo-measured mitral filling volume/sensor-monitored diastolic time.

Results: Diastolic time decreased during stress more markedly than systolic time. At peak stress 62 of the 161 pts showed reversal of the systolic/diastolic ratio with the duration of systole longer than diastole. In the exercise group, at 100 bpm HR, systolic/diastolic time ratio was lower in the 17 controls (0.74 +/- 0.12) than in patients (0.86 +/- 0.10, p < 0.05 vs. controls). Diastolic filling rate increased from 101 +/- 36 (rest) to 219 +/- 92 ml/m2* s-1 at peak stress (p < 0.5 vs. rest).

Conclusion: Cardiological systolic and diastolic duration can be monitored during stress by using an acceleration force sensor. Simultaneous calculation of stroke volume allows monitoring diastolic filling rate.Stress-induced "systolic-diastolic mismatch" can be easily quantified and is associated to several cardiac diseases, possibly expanding the spectrum of information obtainable during stress.

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Summary data. Left panels: plot of systolic (pink symbols) and diastolic (black symbols) mean ± SD time values at increasing heart rates during exercise, dipyridamole and pacing stresses. Right panels: plot of systolic/diastolic time ratio as mean ± SD time values at increasing heart rates in the same patients groups; despite lower peak stress heart rates, dipyridamole patients show systolic/diastole time reversal at around 100 bpm heart rate.
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Figure 7: Summary data. Left panels: plot of systolic (pink symbols) and diastolic (black symbols) mean ± SD time values at increasing heart rates during exercise, dipyridamole and pacing stresses. Right panels: plot of systolic/diastolic time ratio as mean ± SD time values at increasing heart rates in the same patients groups; despite lower peak stress heart rates, dipyridamole patients show systolic/diastole time reversal at around 100 bpm heart rate.

Mentions: Diastolic time decreased from 541 ± 143 to 250 ± 59 msec during exercise, from 651 ± 146 to 387 ± 98 msec in the dipyridamole group, and from 600 ± 108 to 211 ± 48 msec in the pacing group (Figure 7).


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

Bombardini T, Gemignani V, Bianchini E, Venneri L, Petersen C, Pasanisi E, Pratali L, Alonso-Rodriguez D, Pianelli M, Faita F, Giannoni M, Arpesella G, Picano E - Cardiovasc Ultrasound (2008)

Summary data. Left panels: plot of systolic (pink symbols) and diastolic (black symbols) mean ± SD time values at increasing heart rates during exercise, dipyridamole and pacing stresses. Right panels: plot of systolic/diastolic time ratio as mean ± SD time values at increasing heart rates in the same patients groups; despite lower peak stress heart rates, dipyridamole patients show systolic/diastole time reversal at around 100 bpm heart rate.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2365937&req=5

Figure 7: Summary data. Left panels: plot of systolic (pink symbols) and diastolic (black symbols) mean ± SD time values at increasing heart rates during exercise, dipyridamole and pacing stresses. Right panels: plot of systolic/diastolic time ratio as mean ± SD time values at increasing heart rates in the same patients groups; despite lower peak stress heart rates, dipyridamole patients show systolic/diastole time reversal at around 100 bpm heart rate.
Mentions: Diastolic time decreased from 541 ± 143 to 250 ± 59 msec during exercise, from 651 ± 146 to 387 ± 98 msec in the dipyridamole group, and from 600 ± 108 to 211 ± 48 msec in the pacing group (Figure 7).

Bottom Line: Diastolic filling rate was calculated as echo-measured mitral filling volume/sensor-monitored diastolic time.Diastolic time decreased during stress more markedly than systolic time.Cardiological systolic and diastolic duration can be monitored during stress by using an acceleration force sensor.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Echocardiography, Institute of Clinical Physiology, National Council of Research, Pisa, Italy. tbombardini@yahoo.it

ABSTRACT

Unlabelled: A cutaneous force-frequency relation recording system based on first heart sound amplitude vibrations has been recently validated. Second heart sound can be simultaneously recorded in order to quantify both systole and diastole duration.

Aims: 1- To assess the feasibility and extra-value of operator-independent, force sensor-based, diastolic time recording during stress.

Methods: We enrolled 161 patients referred for stress echocardiography (exercise 115, dipyridamole 40, pacing 6 patients).The sensor was fastened in the precordial region by a standard ECG electrode. The acceleration signal was converted into digital and recorded together with ECG signal. Both systolic and diastolic times were acquired continuously during stress and were displayed by plotting times vs. heart rate. Diastolic filling rate was calculated as echo-measured mitral filling volume/sensor-monitored diastolic time.

Results: Diastolic time decreased during stress more markedly than systolic time. At peak stress 62 of the 161 pts showed reversal of the systolic/diastolic ratio with the duration of systole longer than diastole. In the exercise group, at 100 bpm HR, systolic/diastolic time ratio was lower in the 17 controls (0.74 +/- 0.12) than in patients (0.86 +/- 0.10, p < 0.05 vs. controls). Diastolic filling rate increased from 101 +/- 36 (rest) to 219 +/- 92 ml/m2* s-1 at peak stress (p < 0.5 vs. rest).

Conclusion: Cardiological systolic and diastolic duration can be monitored during stress by using an acceleration force sensor. Simultaneous calculation of stroke volume allows monitoring diastolic filling rate.Stress-induced "systolic-diastolic mismatch" can be easily quantified and is associated to several cardiac diseases, possibly expanding the spectrum of information obtainable during stress.

Show MeSH
Related in: MedlinePlus