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Titolo:
MAGNETIC-RESONANCE MEASUREMENT OF BLOOD-FLOW IN PERIPHERAL VESSELS AFTER ACUTE EXERCISE
Autore:
MEYER RA; FOLEY JM; HARKEMA SJ; SIERRA A; POTCHEN EJ;
Indirizzi:
MICHIGAN STATE UNIV,DEPT PHYSIOL,GILTNER HALL E LANSING MI 48824
Titolo Testata:
Magnetic resonance imaging
fascicolo: 8, volume: 11, anno: 1993,
pagine: 1085 - 1092
SICI:
0730-725X(1993)11:8<1085:MMOBIP>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Keywords:
MAGNETIC RESONANCE ANGIOGRAPHY; CINE PHASE-CONTRAST; MUSCLE BLOOD FLOW;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
R.A. Meyer et al., "MAGNETIC-RESONANCE MEASUREMENT OF BLOOD-FLOW IN PERIPHERAL VESSELS AFTER ACUTE EXERCISE", Magnetic resonance imaging, 11(8), 1993, pp. 1085-1092

Abstract

Velocity-encoded Cine magnetic resonance imaging (MRI) was used to measure blood flow in the anterior tibial artery (AT), posterior tibial artery (PT), and popliteal artery of adult human subjects (mean age 29yr) before and after 90 s of ankle dorsiflexion exercise. Before exercise, mean flow, peak systolic velocity, and end-diastolic velocity inAT were 8.1 +/- 1.6 (SE, n = 6) ml/min, 26.9 +/- 2.6 cm/s, and -0.6 +/- 0.4 cm/s, respectively. After exercise, mean flow and peak systolicvelocity in AT increased by 19-fold and 3-fold, respectively, and end-diastolic velocity increased to 8.7 +/- 1.1 cm/s. Flow in popliteal artery above its bifurcation was similar to the sum of flows in AT and PT, both before and after exercise. Flow in AT declined exponentially after exercise with a mean half-time of 4 min. The results demonstratethe utility of MR phase-encoded flow-velocity measurements for physiological studies of peripheral vascular dynamics after exercise.

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Documento generato il 27/11/20 alle ore 02:04:17