Evaluation of blood flow velocity in the ascending aorta and main pulmonary artery of normal subjects by Doppler echocardiography

Gardin, Julius M.; Burn, Cora S.; Childs, W. J.; Henry, Walter L.

doi:10.1016/0002-8703(84)90380-6

Cited by 102 publications

(40 citation statements)

References 14 publications

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“…26 with permission.) pie volume depth, the transducer was angulated to record the maximum flow velocity.…”

Section: Figure 2 Methods For Making Aortic Flow Velocity Measurementmentioning

confidence: 99%

Doppler echocardiographic assessment of left ventricular systolic and diastolic function in mild hypertension.

Gardin¹,

Drayer²,

Weber³

et al. 1987

Hypertension

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SUMMARY Abnormalities in left ventricular (LV) wall thickness and mass have been demonstrated in patients with mild hypertension utilizing M-mode echocardiography. In addition, studies using radionuclide angiography have demonstrated abnormalities in early diastolic LV filling in asymptomatic hypertensive patients with normal ejection fraction and cardiac output. Recently, Doppler recordings of flow velocity in the ascending aorta and through the mitral valve have been shown to provide useful information about LV function. To determine whether flow abnormalities could be detected in patients with mild hypertension, we recorded Doppler aortic and mitral valve flow velocities in 21 men with mild hypertension. Casual systolic blood pressure was 147 ± 18 mm Hg (mean ± SD) and diastolic blood pressure was 96 ± 9 mm Hg. LV mass (310 ± 75 g) was elevated (i.e., above the 95% normal prediction interval) in 8 of 19 patients who underwent M-mode echocardiography; LV ejection fraction was normal in all patients (mean, 80%). As in previous studies in normal subjects, we found in these hypertensive patients an inverse correlation between age and both aortic peak flow velocity (r = -0.51, p < 0.05) and transmitral early diastolic peak flow velocity (r = -0.44, p<0.05) and a positive relationship between age and mitral valve late diastolic peak flow velocity (r = 0.73, p<0.001). Compared to age-corrected normal data, the following mitral flow velocity parameters were abnormal: early diastolic deceleration time (mean, 28% above predicted normal; p<0.005), rate of deceleration of early diastolic flow velocity (mean, 14% below predicted normal; p<0.005), and late diastolic flow time (mean, 17% above normal; p<0.005). Neither aortic peak flow velocity nor mitral early or late diastolic peak flow velocity correlated with echocardiographic LV mass or with casual or 24-hour average systolic or diastolic blood pressure. Only transmitral late diastolic flow velocity integral (area under flow velocity curve) was significantly correlated with LV mass (r = 0.54, p<0.02). We conclude that patients with mild hypertension have normal aortic and transmitral peak flow velocities despite the presence of increased echocardiographic LV muscle mass. However, Doppler evidence of LV filling abnormalities -including a diminished rate of deceleration of early diastolic transmitral flow velocity and increased early diastolic deceleration time and late diastolic flow time -can be detected in these patients.

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“…26 with permission.) pie volume depth, the transducer was angulated to record the maximum flow velocity.…”

Section: Figure 2 Methods For Making Aortic Flow Velocity Measurementmentioning

confidence: 99%

Doppler echocardiographic assessment of left ventricular systolic and diastolic function in mild hypertension.

Gardin¹,

Drayer²,

Weber³

et al. 1987

Hypertension

View full text Add to dashboard Cite

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“…The sample volume depth used for measurement of aortic flow velocity was the one that produced the maximal aortic flow velocity recorded by this mapping technique. 12 In both aortic and pulmonary artery flow velocity measurements, the sample volume was a cylinder approximately 15 mm in axial length and 3 to 4 mm in diameter.12…”

Section: Doppler Echo Evaluation Of Cardiomyopathymentioning

confidence: 99%

Evaluation of dilated cardiomyopathy by pulsed Doppler echocardiography

Gardin

Iseri

Elkayam

et al. 1983

American Heart Journal

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“…Esse achado foi compatível com estudos caprinos (Leroux et al 2012), com cães (Brown et al 1991, Kirberger et al 1992) e em humanos (Gardin et al 1984). Essa diferença de velocidades entre o fluxo aórtico e pulmonar é uma condição esperada, que se deve ao fato que a resistência na circulação sistêmica é quatro a cinco vezes maior que resistência da circulação pulmonar como observado em outras espécies (Brown et al 1991).…”

Section: Discussionunclassified

Estudo ecodopplercardiográfico em caprinos da raça Moxotó

et al. 2018

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RESUMO.-Objetivou-se com este estudo reportar descrições acerca dos cortes ecocardiográficos no modo bidimensional, das dimensões cardíacas pelo modo unidimensional e dos índices de fluxo Doppler em caprinos da raça Moxotó. Foram utilizados 32 caprinos da raça Moxotó, distribuídos em quatro grupos por categoria de peso corporal, de igual número (n=8), em: G1 (5-10kg), G2 (10-15kg), G3 (15-20kg) e G4 (>20kg). Todos foram submetidos a um registro ecocardiográfico pelos modos bidimensional, modo-M, Doppler pulsado (PW), contínuo (CW) e de fluxo de cores (CF). A formação espectral das imagens ecocardiográficas foi satisfatória, contudo algumas adaptações foram necessárias para obtenção adequada dos cortes nos caprinos acima de 20 kg. Os parâmetros ecocardiográficos em modo unidimensional (IVSd, IVSs, LVIDd, LVIDs, VPWd, LVPWs) e índices de função cardíaco (EF e FS) apresentaram uma correlação descritiva positiva com peso corporal enquadradas nas categorias estudadas. A separação septal do ponto E, mostrou-se constante dentre as categorias de peso investigadas, variando entre 0,1 a 0,41cm em caprinos da raça Moxotó. A relação Em/Am foi predominantemente " >1" em todos os This study describes the two-dimensional echocardiographic sections, M-mode cardiac dimensions, and Doppler flow indices in Moxotó goats. A total of 32 Moxotó goats were divided into four equal groups (n = 8) according to body weight class: G1 (5-10 kg), G2 (10-15kg), G3 (15-20kg) and G4 (>20kg). All animals underwent echocardiographic tests, two-dimensional and M-mode, and pulsed (PW), continuous (CW) and color flow (CF) Doppler. The spectral formation of echocardiographic images was satisfactory, although some adjustments were necessary to obtain adequate cuts/sections for goats above 20 kg. One-dimensional echocardiographic parameters (IVSD, IVSS, LVIDd, LVIDs, VPWd, LVPWs) and cardiac function index (EF and FS) showed a positive descriptive correlation with body weight in the categories studied. The septal separation of point E was constant among the weight categories investigated, ranging from 0.1 to 0.41cm. The Em/Am ratio was predominantly ">1", with Emax> Amax in all weight categories, and not affected by the heart rate among the studied weight classes. The IVRT was also uniform among the studied weight classes. The individual flow rates of the aortic valve were higher than the maximum flow rate of the pulmonary valve. The ejection times of the aortic and pulmonary flows were positively correlated with increasing body weight, something also observed on the VTI of flow spectra, given the direct relationship of this variable with the stroke volume inversely to FC. The acceleration time (AT) of pulmonary blood flow was greater than the aortic flow, and directly related to increasing body weight and inversely with heart rate. Thus, the standardization of Doppler echocardiographic variables in goats, should always consider breed, age and body weight as well as repeatability and reproducibility studies and adoption of individual reference elements ...

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Evaluation of blood flow velocity in the ascending aorta and main pulmonary artery of normal subjects by Doppler echocardiography

Cited by 102 publications

References 14 publications

Doppler echocardiographic assessment of left ventricular systolic and diastolic function in mild hypertension.

Doppler echocardiographic assessment of left ventricular systolic and diastolic function in mild hypertension.

Evaluation of dilated cardiomyopathy by pulsed Doppler echocardiography

Estudo ecodopplercardiográfico em caprinos da raça Moxotó

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