Abstract
Objective: No data have ever been published regarding cardiac assistance in demand dynamic cardiomyoplasty (DDCMP). We tested the efficacy of the Doppler flow wire in measuring beat-to-beat aortic flow velocity and evaluating cardiac assistance in demand cardiomyoplasty patients. Methods: The technique was tested in seven patients (M/F = 6/1; age = 57.1 ± 6.2 years; atrial fibrillation/sinus rhythm = 1/6; NYHA = 1.4 ± 0.5). Measurements were done using a 0.018inch peripheral Doppler flow wire advanced through a 5F arterial femoral sheath. Three 1-min periods with the stimulator off and three 1-min periods with clinical stimulation were recorded. We measured peak aortic flow velocity in all beats. Latissimus dorsi (LD) mechanogram was simultaneously recorded. Results: Comparison between pre-operative and follow-up data showed significantly higher values of tetanic fusion frequency (TFF) and ejection fraction at follow-up, whereas mean NYHA class was significantly lower. Statistical analysis showed an increase in aortic flow velocity not only in assisted versus rest period, but also in assisted versus unassisted beats (8.42 ± 6.98% and 7.55 ± 3.07%). A linear correlation was found between the increase in flow velocity and LD wrap TFF (r2 = 0.53). Conclusions: In DDCMP, systolic assistance is significant and correlated to LD speed of contraction; demand stimulation protocol maintains muscle properties and increases muscle performance.
| Original language | English |
|---|---|
| Pages (from-to) | 478-482 |
| Number of pages | 5 |
| Journal | European Journal of Cardio-thoracic Surgery |
| Volume | 21 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2002 |
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Keywords
- Heart failure
- Ultrasound
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
- Surgery
Cite this
Activity-rest stimulation protocol improves cardiac assistance in dynamic cardiomyoplasty. / Rigatelli, Gianluca; Carraro, Ugo; Barbiero, Mario; Zanchetta, Mario; Dimopoulos, Konstantinos; Cobelli, Franco; Riccardi, Riccardo; Rigatelli, Giorgio.
In: European Journal of Cardio-thoracic Surgery, Vol. 21, No. 3, 2002, p. 478-482.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Activity-rest stimulation protocol improves cardiac assistance in dynamic cardiomyoplasty
AU - Rigatelli, Gianluca
AU - Carraro, Ugo
AU - Barbiero, Mario
AU - Zanchetta, Mario
AU - Dimopoulos, Konstantinos
AU - Cobelli, Franco
AU - Riccardi, Riccardo
AU - Rigatelli, Giorgio
PY - 2002
Y1 - 2002
N2 - Objective: No data have ever been published regarding cardiac assistance in demand dynamic cardiomyoplasty (DDCMP). We tested the efficacy of the Doppler flow wire in measuring beat-to-beat aortic flow velocity and evaluating cardiac assistance in demand cardiomyoplasty patients. Methods: The technique was tested in seven patients (M/F = 6/1; age = 57.1 ± 6.2 years; atrial fibrillation/sinus rhythm = 1/6; NYHA = 1.4 ± 0.5). Measurements were done using a 0.018inch peripheral Doppler flow wire advanced through a 5F arterial femoral sheath. Three 1-min periods with the stimulator off and three 1-min periods with clinical stimulation were recorded. We measured peak aortic flow velocity in all beats. Latissimus dorsi (LD) mechanogram was simultaneously recorded. Results: Comparison between pre-operative and follow-up data showed significantly higher values of tetanic fusion frequency (TFF) and ejection fraction at follow-up, whereas mean NYHA class was significantly lower. Statistical analysis showed an increase in aortic flow velocity not only in assisted versus rest period, but also in assisted versus unassisted beats (8.42 ± 6.98% and 7.55 ± 3.07%). A linear correlation was found between the increase in flow velocity and LD wrap TFF (r2 = 0.53). Conclusions: In DDCMP, systolic assistance is significant and correlated to LD speed of contraction; demand stimulation protocol maintains muscle properties and increases muscle performance.
AB - Objective: No data have ever been published regarding cardiac assistance in demand dynamic cardiomyoplasty (DDCMP). We tested the efficacy of the Doppler flow wire in measuring beat-to-beat aortic flow velocity and evaluating cardiac assistance in demand cardiomyoplasty patients. Methods: The technique was tested in seven patients (M/F = 6/1; age = 57.1 ± 6.2 years; atrial fibrillation/sinus rhythm = 1/6; NYHA = 1.4 ± 0.5). Measurements were done using a 0.018inch peripheral Doppler flow wire advanced through a 5F arterial femoral sheath. Three 1-min periods with the stimulator off and three 1-min periods with clinical stimulation were recorded. We measured peak aortic flow velocity in all beats. Latissimus dorsi (LD) mechanogram was simultaneously recorded. Results: Comparison between pre-operative and follow-up data showed significantly higher values of tetanic fusion frequency (TFF) and ejection fraction at follow-up, whereas mean NYHA class was significantly lower. Statistical analysis showed an increase in aortic flow velocity not only in assisted versus rest period, but also in assisted versus unassisted beats (8.42 ± 6.98% and 7.55 ± 3.07%). A linear correlation was found between the increase in flow velocity and LD wrap TFF (r2 = 0.53). Conclusions: In DDCMP, systolic assistance is significant and correlated to LD speed of contraction; demand stimulation protocol maintains muscle properties and increases muscle performance.
KW - Heart failure
KW - Ultrasound
UR - http://www.scopus.com/inward/record.url?scp=0036118719&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036118719&partnerID=8YFLogxK
U2 - 10.1016/S1010-7940(01)01152-6
DO - 10.1016/S1010-7940(01)01152-6
M3 - Article
C2 - 11888767
AN - SCOPUS:0036118719
VL - 21
SP - 478
EP - 482
JO - European Journal of Cardio-thoracic Surgery
JF - European Journal of Cardio-thoracic Surgery
SN - 1010-7940
IS - 3
ER -