Search results for "arterial baroreflex"

showing 3 items of 3 documents

Modulation of Heart Rate by Acute or Chronic Aerobic Exercise. Potential Effects on Blood Pressure Control.

2017

It was initially assumed that heart rate and arterial blood pressure were modulated by normal respiration and muscle contraction. The arterial baroreflex, an inverse relationship between blood pressure and heart rate, was later reported. Nonetheless, it was then assumed that those responses involved vagal modulation. We summarize available evidence on the modulation of heart rate by acute or chronic aerobic exercise as well as its potential implications on blood pressure (BP) control. Numerous studies have tried to clarify whether aerobic exercise modifies neurally-mediated vasoconstriction, but they report contradictory results. In view of these incongruities, the aim of this narrative rev…

0301 basic medicinemedicine.medical_specialtyhypertensionBlood Pressureexercise; arterial baroreflex; autonomous nervous system; blood pressure; heart rate; hypertension.Disease03 medical and health sciences0302 clinical medicineHeart Rateautonomous nervous systemInternal medicineDrug DiscoveryHeart rateRespirationHeart rate variabilityMedicineAerobic exerciseAnimalsHumansCardiovascular fitnessExercisePharmacologybusiness.industryarterial baroreflex030229 sport sciences030104 developmental biologyBlood pressureCardiologymedicine.symptombusinessVasoconstrictionCurrent pharmaceutical design
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Vascular resistance arm of the baroreflex: methodology and comparison with the cardiac chronotropic arm.

2020

Baroreflex response consists of cardiac chronotropic (effect on heart rate), cardiac inotropic (on contractility), venous (on venous return) and vascular (on vascular resistance) arms. Because of its measurement simplicity, cardiac chronotropic arm is most often analysed. The aim was to introduce a method to assess vascular baroreflex arm, and to characterize its changes during stress. We evaluated the effect of orthostasis and mental arithmetics (MA) in 39 (22 female, median age: 18.7 yrs.) and 36 (21 female, 19.2 yrs.) healthy volunteers, respectively. We recorded systolic and mean blood pressure (SBP and MBP) by volume-clamp method and R-R interval (RR) by ECG. Cardiac output (CO) was re…

ChronotropicMalemedicine.medical_specialtyAdolescentPhysiologyBlood Pressure030204 cardiovascular system & hematologyBaroreflex03 medical and health sciences0302 clinical medicineHeart RatePhysiology (medical)Internal medicinemedicineHumansimpedance cardiographyCardiac OutputArterial baroreflexHeart rate responsemedicine.diagnostic_testbusiness.industrymusculoskeletal neural and ocular physiologyArterial baroreflexBaroreflexspectral couplingImpedance cardiographymedicine.anatomical_structureBlood pressureSettore ING-INF/06 - Bioingegneria Elettronica E InformaticaVascular resistanceCardiologyFemaleVascular Resistancebusiness030217 neurology & neurosurgeryJournal of applied physiology (Bethesda, Md. : 1985)
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Input for baroreflex analysis: which blood pressure signal should be used?

2022

The baroreflex (BR) is an important physiological regulatory mechanism which reacts to blood pressure perturbations with reflex changes of target variables such as the heart period (electrocardiogram derived RR interval) or the peripheral vascular resistance (PVR). Evaluation of cardiac chronotropic (RR as a target variable) and vascular resistance (target PVR) BR arms was in previous studies mainly based on the use of the spontaneous variability of the systolic or diastolic blood pressure (SBP, DBP), respectively, as the input signals. The use of other blood pressure measures such as the mean blood pressure (MBP) as an input signal for BR analysis is still under investigation. Making the a…

Settore ING-INF/06 - Bioingegneria Elettronica E InformaticaArterial baroreflex blood pressure cardiovascular variability spectral analysis transfer function head-up tilt mental arithmetic task muscle sympathetic nerve activity
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