Cardiac Output by Transesophageal Echocardiography Using Continuous-wave Doppler across the Aortic Valve

Darmon, Pierre-Louis; Hillel, Zak; Mogtader, Allen; Mindich, Bruce P.; Thys, Daniel M.

doi:10.1097/00000542-199404000-00011

Cited by 172 publications

(64 citation statements)

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“…Former approaches to Doppler estimation of cardiac output employed the pulmonary artery and the mitral valve as sampling sites, but showed a high failure rate [8]. Recently, a transgastric long axis view has been described [9][10][11], which is a prerequisite for measurement of cardiac output at the level of the left ventricular outflow tract (LVOT). With this view, the LVOT, the aortic valve and the ascending aorta are situated in a two-dimensional image in one straight line from either the transverse or longitudinal plane, permitting exact alignment of the Doppler beam to the direction of blood flow.…”

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confidence: 99%

“…The pulmonary artery has been the preferred sampling site of other investigators [7,8,[25][26][27] The failure rate of 10-29% (Table 3) is explained both by problems in measurement of the diameter of the vessel and by interference from the left main bronchus. It follows that Doppler cardiac output measured at the level of the aortic orifice area is an appealing technique, being relatively easily accessible [9,10] and highly reproducible [28].…”

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A comparison of transoesophageal echocardiographic Doppler across the aortic valve and the thermodilution technique for estimating cardiac output

Poelaert¹,

Schmidt²,

Aken³

et al. 1999

Anaesthesia

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SummaryThis study was undertaken in order to elucidate the differences between various planes of measurement and Doppler techniques (pulsed-vs. continuous-wave Doppler) across the aortic valve to estimate cardiac output. In 45 coronary artery bypass patients, cardiac output was measured each time using four different Doppler techniques (transverse and longitudinal plane, pulsed-and continuous-wave Doppler) and compared with the thermodilution technique. Measurements were performed after induction of anaesthesia and shortly after arrival in the intensive care unit. Optimal imaging was obtained in 91% of the patients, in whom a total of 82 measurements of cardiac output were performed. The respective mean (SD) areas of the aortic valve were 3.77 (0.71) cm 2 in the transverse plane and 3.86 (0.89) cm 2 in the longitudinal plane. A correlation of 0.87 was found between pulsed-wave Doppler cardiac output and the thermodilution technique in either transverse or longitudinal plane. Correlation coefficients of 0.82 and 0.84 were found between thermodilution cardiac output and transverse and longitudinal continuous-wave Doppler cardiac output, respectively. Although thermodilution cardiac output is a widely accepted clinical standard, transoesophageal Doppler echocardiography across the aortic valve offers adequate estimations of cardiac output. In particular, pulsed-wave Doppler cardiac output in both the transverse and longitudinal plane provides useful data.

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confidence: 99%

mentioning

confidence: 99%

A comparison of transoesophageal echocardiographic Doppler across the aortic valve and the thermodilution technique for estimating cardiac output

Poelaert¹,

Schmidt²,

Aken³

et al. 1999

Anaesthesia

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“…La medición de las presiones de llenado cardiaco habitualmente utilizadas para guiar la reposición de volumen, puede verse afectada por alteraciones de la distensibilidad de la pared ventricular, aumentos de la presión intratorácica o disfunción ventricular, factores que limitan y cuestionan la utilidad de estas mediciones [3][4][5][6][7][8][9][10] . En el paciente del caso 1, y en el contexto de una resección hepática, es planteable el desarrollo de hipovolemia que pudiera haber sido insufi cientemente corregida.…”

Section: Discussionunclassified

Casos clínicos: ecocardiografía transesofágica y monitorización hemodinámica en cirugía no cardiaca

2011

Rev. méd. Chile

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“…where TVI is the time velocity integral of the flow through the aortic valve obtained with continuous wave Doppler in the deep transgastric view, and AVA is the mean effective aortic valve area obtained in the basal short axis view with the transducer rotated to ± 30°, as described by Darmon et al [6]. Instantaneous aortic blood flow (Q(t)) was estimated as…”

Section: Methodsmentioning

confidence: 99%

A comparative study of preload‐adjusted maximal and peak power: assessment of ventricular performance in clinical practice

Amà¹,

Claessens

Roosens

et al. 2004

Anaesthesia

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SummaryThis study was performed to determine whether preload-adjusted peak power can act as a surrogate for preload-adjusted maximal power in the assessment of left ventricular performance in the clinical setting. Ninety-nine consecutive patients who had undergone elective coronary artery bypass grafting were studied. Fifty-five of these patients were divided into four study groups. Afterload was changed with phenylephrine (n = 12) or glyceryl trinitrate (n = 13), preload was increased with intravenous colloid (n = 18), and contractility was increased with dobutamine (n = 12). There was excellent correlation between the two indices (r = 0.99, y = 1.0168x + 0.0769; p < 0.0001). Manipulation of neither preload nor afterload affected the indices. Both indices increased significantly during dobutamine infusion (p = 0.002). In conclusion, preload-adjusted peak power can be used as a substitute for preload-adjusted maximal power in the determination of ventricular performance in clinical practice.

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Cardiac Output by Transesophageal Echocardiography Using Continuous-wave Doppler across the Aortic Valve

Cited by 172 publications

References 0 publications

A comparison of transoesophageal echocardiographic Doppler across the aortic valve and the thermodilution technique for estimating cardiac output

A comparison of transoesophageal echocardiographic Doppler across the aortic valve and the thermodilution technique for estimating cardiac output

Casos clínicos: ecocardiografía transesofágica y monitorización hemodinámica en cirugía no cardiaca

A comparative study of preload‐adjusted maximal and peak power: assessment of ventricular performance in clinical practice

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