Cardiovascular haemodynamics and Doppler waveforms explained

Cardiovascular haemodynamics in pre-eclampsia using brain naturetic peptide and tissue Doppler studies

AIM To determine early haemodynamic changes in preeclampsia (PE) using tissue Doppler echocardiography and brain natriuretic peptide (BNP), and to relate these changes to obstetric outcomes. METHODS Consenting primigravidae patients in the third trimester of pregnancy were included in the study, which was carried out in a large regional hospital in Durban, South Africa; 115 primigravidae (52 ...

Doppler haemodynamics of cerebral venous return.

Physiologic functioning of the cerebrovenous system is indispensable for maintaining normal brain function. However, in contrast to the cerebroarterial system, the cerebral venous return is not routinely investigated. Combined high-resolution echo-colour-Doppler (ECD) and transcranial colour coded Doppler sonography (TCCS) represents an ideal method to investigate the haemodynamics of cerebral ...

Doppler Resilient Waveforms with Perfect Autocorrelation

We describe a method of constructing a sequence of phase coded waveforms with perfect autocorrelation in the presence of Doppler shift. The constituent waveforms are Golay complementary pairs which have perfect autocorrelation at zero Doppler but are sensitive to nonzero Doppler shifts. We extend this construction to multiple dimensions, in particular to radar polarimetry, where the two dimensi...

Doppler waveforms of the human fetal cardiovascular system: a mathematical model

Echo-Doppler assessment of diastole: flow, function and haemodynamics.

To cite: Gillebert TC, De Pauw M, Timmermans F. Heart 2013, 99, 55–64. The concepts related to diastolic function were developed by muscle physiologists and by cardiologists with a strong background in physics (cardiac mechanics and fluid dynamics). These scientists described left ventricular (LV) material properties in terms of pressures and volumes, and their mutual relation. When a given vol...