The nature of flow in the systemic venous pathway measured by magnetic resonance blood tagging in patients having the Fontan operation
OBJECTIVES: 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.
METHODS: 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.
RESULTS: 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 "pluglike" in the mid-baffle area during cardiac or respiratory imaging (45 +/- 17 and 32 +/- 11 cm/sec, respectively).
CONCLUSION: A substantial amount of pulmonary blood flow in patients who have undergone a total cavopulmonary connection type of Fontan operation has a cardiac component. Furthermore, we confirm that this flow is laminar but nonuniform across the systemic venous pathway. Highest flows occurred near end-systole and early diastole, as well as in inspiration, and the lowest flow occurred in diastasis. This information may help in designing the systemic venous pathway and optimizing medical management.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
1997 |
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| Erschienen: |
1997 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:114 |
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| Enthalten in: |
The Journal of thoracic and cardiovascular surgery - 114(1997), 6 vom: 15. Dez., Seite 1032-41 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Fogel, M A [VerfasserIn] |
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| Themen: |
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| Anmerkungen: |
Date Completed 12.02.1998 Date Revised 16.03.2022 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM09378029X |
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|---|---|---|---|
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| 100 | 1 | |a Fogel, M A |e verfasserin |4 aut | |
| 245 | 1 | 4 | |a The nature of flow in the systemic venous pathway measured by magnetic resonance blood tagging in patients having the Fontan operation |
| 264 | 1 | |c 1997 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
| 338 | |a Band |b nc |2 rdacarrier | ||
| 500 | |a Date Completed 12.02.1998 | ||
| 500 | |a Date Revised 16.03.2022 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a OBJECTIVES: 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 | ||
| 520 | |a METHODS: 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 | ||
| 520 | |a RESULTS: 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 "pluglike" in the mid-baffle area during cardiac or respiratory imaging (45 +/- 17 and 32 +/- 11 cm/sec, respectively) | ||
| 520 | |a CONCLUSION: A substantial amount of pulmonary blood flow in patients who have undergone a total cavopulmonary connection type of Fontan operation has a cardiac component. Furthermore, we confirm that this flow is laminar but nonuniform across the systemic venous pathway. Highest flows occurred near end-systole and early diastole, as well as in inspiration, and the lowest flow occurred in diastasis. This information may help in designing the systemic venous pathway and optimizing medical management | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 700 | 1 | |a Weinberg, P M |e verfasserin |4 aut | |
| 700 | 1 | |a Hoydu, A |e verfasserin |4 aut | |
| 700 | 1 | |a Hubbard, A |e verfasserin |4 aut | |
| 700 | 1 | |a Rychik, J |e verfasserin |4 aut | |
| 700 | 1 | |a Jacobs, M |e verfasserin |4 aut | |
| 700 | 1 | |a Fellows, K E |e verfasserin |4 aut | |
| 700 | 1 | |a Haselgrove, J |e verfasserin |4 aut | |
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| 773 | 1 | 8 | |g volume:114 |g year:1997 |g number:6 |g day:15 |g month:12 |g pages:1032-41 |
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| 952 | |d 114 |j 1997 |e 6 |b 15 |c 12 |h 1032-41 | ||