Measurement of regional coronary outflow by thermodilution correlation with inflow

Ganz, William; Lang, Tzu-Wang; Kurita, Akira; Hashimoto, Keiichi; Corday, Eliot

doi:10.1016/0002-9149(76)90601-9

Cited by 4 publications

(2 citation statements)

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“…Coronary sinus blood flow was determined by the constant infusion thermodilution technique using a preshaped coronary sinus catheter equipped with two thermistors and bipolar pacing electrodes (Wilton Webster Laboratories). 6 The catheter was inserted from the left antecubital vein and placed in the coronary sinus in such a way that the external thermistor was 10 to 20 mm inside the coronary sinus. A stable catheter position was checked under fluoroscopy by injections of small amounts of contrast medium.…”

Section: Patient Studiesmentioning

confidence: 99%

Coronary sinus reflux. A source of error in the measurement of thermodilution coronary sinus flow.

Mathey¹,

Chatterjee²,

Tyberg³

et al. 1978

Circulation

126

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In seven patients thermodilution coronary sinus flow (TD-CSF) was higher (164 +/- 21 ml/min) during ventricular pacing than during atrial pacing (119 +/- 21 ml/min, P less than 0.005) at identical heart rate, without an increase in the determinants of myocardial oxygen consumption. To assess the possibility of right atrial admixture in coronary sinus blood during ventricular pacing we compared electromagnetic coronary arterial blood flow (CBF) with TD-CSF in nine dogs during interventions that increased right atrial pressure. During ventricular pacing, rapid atrial pacing, pulmonary artery constriction and increased intrathoracic pressure, right atrial pressure increased and electromagnetic CBF was significantly less (41-166%) than TD-CSF. Marked reflux from the right atrium to the coronary sinus was also demonstrated by bolus injection of cold saline into the right atrium and continuous infusion of contrast material into coronary sinus. Caution needs to be exercised in interpreting TD-CSF in the presence of changing right atrial pressure.

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Section: Patient Studiesmentioning

confidence: 99%

Coronary sinus reflux. A source of error in the measurement of thermodilution coronary sinus flow.

Mathey¹,

Chatterjee²,

Tyberg³

et al. 1978

Circulation

126

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“…Cor-onary venous blood draining into the coronary sinus mixes with the injectate and is cooled by an amount proportional to the rate of venous blood flow. Coronary sinus flow is then calculated from the temperature and infusion rate of the injectate, and the temperature of the bloodhnjectate mixture near the coronary sinus ostium, by applying established formulae [ 11. In dogs, excellent correlations have been shown between thermodilution estimates of coronary sinus flow and either timed direct collections of coronary sinus blood [l] or electromagnetic measurements of coronary arterial inflow [4]. Arterial inflow, measured by electromagnetic flow transducers applied to the coronary arteries at the time of surgery, and venous flow, measured by thermodilution, have also shown good correlation in a human study [ 5 ] .…”

Section: Introductionmentioning

confidence: 99%

Measurement of coronary sinus flow by thermodilution: Observations on the effect of respiration and a review of the potential sources of error

Stewart

Gray

1989

Cathet. Cardiovasc. Diagn.

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In a series of experiments involving measurement of left ventricular blood flow by thermodilution in the coronary sinus, a consistent, but unexpected, variation in calculated coronary sinus flow, related to respiration, was seen. In some patients the variation was small, but in others it was as much as 300%. To discover its cause, five patients were investigated prospectively with continuous right atrial pressure monitoring during coronary flow measurement and respiratory manoeuvres. In three, ice-cold saline was injected into the right atrium during respiratory manoeuvres while coronary sinus temperature was monitored continuously and the position of the catheter was monitored fluoroscopically. The cause was found to be movement of the catheter such that thermistor approached the right atrium, and the variation was therefore spurious. We report these findings and discuss other known causes of inaccurate coronary flow measurement using the thermodilution technique.

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Glossary: Methods for the measurement of coronary blood flow and myocardial perfusion

1996

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Measurement of regional coronary outflow by thermodilution correlation with inflow

Cited by 4 publications

References 0 publications

Coronary sinus reflux. A source of error in the measurement of thermodilution coronary sinus flow.

Coronary sinus reflux. A source of error in the measurement of thermodilution coronary sinus flow.

Measurement of coronary sinus flow by thermodilution: Observations on the effect of respiration and a review of the potential sources of error

Glossary: Methods for the measurement of coronary blood flow and myocardial perfusion

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