PMID: 9434698Jan 22, 1998Paper

The nature of flow in the systemic venous pathway measured by magnetic resonance blood tagging in patients having the Fontan operation

The Journal of Thoracic and Cardiovascular Surgery
Mark A FogelJ Haselgrove

Abstract

Our objectives were twofold: (1) to determine cardiac and respiratory dependency of systemic venous pathway flow of patients having the Fontan operation with a total cavopulmonary connection and (2) to describe the velocity profile. Systemic venous pathway flow is hypothesized to be mostly respiratory dependent, to be laminar, and to have a smooth velocity profile. Twenty-two patients having the Fontan operation (aged 8.6 +/- 4.7 years) underwent magnetic resonance blood tagging (bolus tagging). Systemic venous pathway spin-echo images parallel to the blood flow were used as a localizer. A saturation pulse labeled the blood, and a cine image was acquired at the inferior and superior venae cavae and midportion of the baffle in the systemic venous pathway, triggered to the electrocardiogram and gated to both end-expiration and end-inspiration. Repetition time was 50 msec. Flow in the systemic venous pathway was laminar throughout its course and was found to be phasic to both cardiac and respiratory cycles. Approximately 70% of flow was cardiac dependent, and the rest was respiratory. Highest flow occurred near end-systole and early diastole and in inspiration. Lowest flow occurred in diastasis. Velocity was highest and flow least...Continue Reading

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Citations

Jan 29, 2010·Pediatric Radiology·Jonathan R DillmanRamiro J Hernandez
Dec 23, 2003·The Journal of Thoracic and Cardiovascular Surgery·William L BorderJeffrey M Pearl
Jan 23, 2003·The Annals of Thoracic Surgery·Aitizaz U SyedJeffery M Pearl
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