Search results for "Baroreflex regulation"

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Evidence of unbalanced regulatory mechanism of heart rate and systolic pressure after acute myocardial infarction

2002

The interactions between systolic arterial pressure (SAP) and R-R interval (RR) fluctuations after acute myocardial infarction (AMI) were investigated by measures of synchronization separating the feedback from the feedforward control and capturing both linear and nonlinear contributions. The causal synchronization, evaluating the ability of RR to predict SAP (χs/t) or vice versa (χt/s), and the global synchronization (χ) were estimated at rest and after head-up tilt in 35 post-AMI patients, 20 young and 12 old. Significance and nonlinearity of the coupling were assessed by surrogate data analysis. Tilting increased the number of young subjects in which RR-SAP link was significant (from 17…

Adultmedicine.medical_specialtyPhysiologyMyocardial InfarctionHemodynamicsBlood PressureSynchronizationAutonomic Nervous SystemHeart RatePhysiology (medical)Internal medicineHeart ratemedicineNonlinear couplingHumansMyocardial infarctionNonlinear couplingAgedFeedback PhysiologicalSurrogate data analysisbusiness.industryCausal analysicausal analysis; nonlinear coupling; synchronization; baroreflex regulationcausal analysisBaroreflexMiddle Agedmedicine.diseaseEndocrinologyBlood pressureNeural regulationSystolic arterial pressureCardiologyBaroreflex regulationCardiology and Cardiovascular Medicinebusiness
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