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noninvasive central blood pressure

Trefor Morgan
Central Systolic Blood Pressure is lower than brachial artery blood Pressure due to reflected waves and greater augmentation at the periphery. The relationship is not consistent during life and alters with aging of the blood vessels. Increasing stiffness means that a greater component of the reflected waves returns to the central aorta during systolic contraction causing more amplification and a higher systolic blood pressure. Diastolic blood pressure on the other hand is always higher in the aorta than at the periphery allowing blood flow...
September 2016: Journal of Hypertension
Tiina Vilmi-Kerälä, Outi Palomäki, Päivi Kankkunen, Leena Juurinen, Jukka Uotila, Ari Palomäki
INTRODUCTION: Gestational diabetes mellitus (GDM) is an indicator of future cardiovascular disease. We investigated if sensitive biomarkers of increased cardiovascular risk differ between women with and without a history of GDM few years after pregnancy, and whether obesity affects the results. MATERIAL AND METHODS: We studied two cohorts - 120 women with a history of GDM and 120 controls, on average 3.7 years after delivery. Circulating concentrations of oxidized low-density lipoprotein (oxLDL) were determined by ELISA...
September 28, 2016: Acta Obstetricia et Gynecologica Scandinavica
Trefor Morgan
Central Systolic Blood Pressure is lower than brachial artery blood Pressure due to reflected waves and greater augmentation at the periphery. The relationship is not consistent during life and alters with aging of the blood vessels. Increasing stiffness means that a greater component of the reflected waves returns to the central aorta during systolic contraction causing more amplification and a higher systolic blood pressure. Diastolic blood pressure on the other hand is always higher in the aorta than at the periphery allowing blood flow...
September 2016: Journal of Hypertension
Paulo César Brandão Veiga Jardim, Weimar Kunz Sebba Barroso de Souza, Renato Delascio Lopes, Andréa Araújo Brandão, Marcus V Bolívar Malachias, Marco Mota Gomes, Heitor Moreno Júnior, Eduardo Costa Duarte Barbosa, Rui Manoel Dos Santos Póvoa
BACKGROUND: A registry assessing the care of hypertensive patients in daily clinical practice in public and private centers in various Brazilian regions has not been conducted to date. Such analysis is important to elucidate the effectiveness of this care. OBJECTIVE: To document the current clinical practice for the treatment of hypertension with identification of the profile of requested tests, type of administered treatment, level of blood pressure (BP) control, and adherence to treatment...
August 2016: Arquivos Brasileiros de Cardiologia
Gary L Pierce, Mohanasundari Pajaniappan, Amy DiPietro, Kathryn Darracott-Woei-A-Sack, Gaston K Kapuku
We hypothesized that increased aortic forward pressure wave amplitude (Pf), which is determined by characteristic impedance (Zc) in the proximal aorta, is the primary hemodynamic determinant of obesity-associated higher left ventricular (LV) mass in adolescents. Aortic pulsatile hemodynamics were measured noninvasively in 60 healthy adolescents (age 14-19 years; 42% male; 50% black) by sequential recordings of pulse waveforms via tonometry, brachial blood pressure, and pulsed Doppler and diameter of the LV outflow tract using 2-dimensional echocardiography...
November 2016: Hypertension
Michael Kostapanos, Carmel M McEniery, Ian B Wilkinson
Vital organs are exposed to the central rather than the brachial blood pressure. To date, central blood pressure can be assessed noninvasively through the use of several devices. In this review, we critically discuss the clinical relevance of central blood pressure assessment. Considerable evidence suggests that central blood pressure is a better predictor of end-organ damage than brachial blood pressure. However, there is still uncertainty concerning the value of central pressure for predicting cardiovascular outcomes, as the existing studies are underpowered to address this issue...
September 6, 2016: VASA. Zeitschrift Für Gefässkrankheiten
Sascha Ketelhut, Florian Milatz, Walter Heise, Reinhard G Ketelhut
BACKGROUND: Regular physical activity is known to reduce arterial pressure (BP). In a previous investigation, we could prove that even a single bout of moderate-intensity continuous exercise (MICE) causes a prolonged reduction in BP. Whether high-intensity interval training (HIIT) has a favourable influence on BP, and therefore may be followed subjects and methods by a prolonged BP reduction, should be examined on the basis of blood pressure response after exercise and during a subsequent stress test...
September 2016: VASA. Zeitschrift Für Gefässkrankheiten
Cagla Akalanli, David Tay, James D Cameron
The central aortic blood pressure (cBP) waveform, which is different to that of peripheral locations, is a clinically important parameter for assessing cardiovascular function, however the gold standard for measuring cBP involves invasive catheter-based techniques. The difficulties associated with invasive measurements have given rise to the development of a variety of noninvasive methods. An increasingly applied method for the noninvasive derivation of cBP involves the application of transfer function (TF) techniques to a non-invasively measured radial blood pressure (BP) waveform...
October 1, 2016: Computers in Biology and Medicine
Wenqing Lu, Jijian Zheng, Lingqi Gao, Yingtian Wang
STUDY OBJECTIVE: To compare the efficacy of lightwand-guided classic laryngeal mask airway (cLMA) real-time insertion technique with the standard recommended index finger-guided insertion technique. DESIGN: Prospective, randomized controlled study. SETTING: University-affiliated hospital. PATIENTS: Three hundred patients undergoing minor gynecological or orthopedic surgeries under general anesthesia using the cLMA as an airway management tool...
September 2016: Journal of Clinical Anesthesia
M Di Pilla, R M Bruno, L Ghiadoni, F Stea, L Massetti, I Bertolozzi, S Taddei, P A Modesti
OBJECTIVE: The effects of seasonality on blood pressure (BP) and cardiovascular events are well established. However, the influence of seasonality and other environmental factors such as air pollutants on arterial stiffness, a key parameter for cardiovascular risk stratification in hypertensive patients, has never been analyzed. This cross-sectional study aimed at investigating whether seasonality (daily number of hours of light) and acute variations in outdoor temperature and air pollutants may affect carotid-femoral pulse wave velocity (PWV)...
September 2016: Journal of Hypertension
Firat Bektas, Secgin Soyuncu
INTRODUCTION: Transcutaneous cardiac pacing (TCP) is a rapid, time-saving, and noninvasive ventricular stimulation that is tolerated by conscious patients despite the painful intervention for treatment of symptomatic bradycardias. The goal of this study was to determine the efficacy of TCP in unstable bradycardia patients in emergency department (ED). METHODS: This single-central, observational clinical study was conducted on patients older than 18 years who presented with acute unstable bradycardia to the tertiary care university ED...
July 15, 2016: American Journal of Emergency Medicine
Rasmus K Carlsen, Christian D Peters, Dinah S Khatir, Esben Laugesen, Hans Erik Bøtker, Simon Winther, Niels H Buus
Central blood pressure (BP) can be assessed noninvasively based on radial tonometry and may potentially be a better predictor of clinical outcome than brachial BP. However, the validity of noninvasively obtained estimates has never been examined in patients with chronic kidney disease (CKD). Here we compared invasive aortic systolic BP (SBP) with estimated central SBP obtained by radial artery tonometry and examined the influence of renal function and arterial stiffness on this relationship. We evaluated 83 patients with stage 3 to 5 CKD (mean estimated glomerular filtration rate [eGFR] 30 ml/min/1...
October 2016: Kidney International
Xiaoqing Peng, Martin G Schultz, Walter P Abhayaratna, Michael Stowasser, James E Sharman
BACKGROUND: New techniques that measure central blood pressure (BP) using an upper arm cuff-based approach require performance assessment. The aim of this study was to compare a cuff-based device (CuffCBP) to estimate central BP indices (systolic BP (SBP), diastolic BP (DBP), pulse pressure (PP), augmentation pressure (AP), augmentation index (AIx)) with noninvasive radial tonometry (TonCBP). METHODS: Consecutive CuffCBP (SphygmoCor Xcel) and TonCBP (SphygmoCor 8...
October 2016: American Journal of Hypertension
(no author information available yet)
No abstract text is available yet for this article.
June 2016: Annals of Intensive Care
Paolo Salvi, Andrea Grillo, Gianfranco Parati
No abstract text is available yet for this article.
July 2016: Journal of Hypertension
Cathy Mitchell
Hypoperfusion is the most common event preceding the onset of multiple organ dysfunction syndrome during trauma resuscitation. Detecting subtle changes in perfusion is crucial to ensure adequate tissue oxygenation and perfusion. Traditional methods of detecting physiological changes include measurements of blood pressure, heart rate, urine output, serum levels of lactate, mixed venous oxygen saturation, and central venous oxygen saturation. Continuous noninvasive monitoring of tissue oxygen saturation in muscle has the potential to indicate severity of shock, detect occult hypoperfusion, guide resuscitation, and be predictive of the need for interventions to prevent multiple organ dysfunction syndrome...
June 2016: Critical Care Nurse
Mingwu Gao, N Bari Olivier, Ramakrishna Mukkamala
Pulse transit time (PTT) measured as the time delay between invasive proximal and distal blood pressure (BP) or flow waveforms (invasive PTT [I-PTT]) tightly correlates with BP PTT estimated as the time delay between noninvasive proximal and distal arterial waveforms could therefore permit cuff-less BP monitoring. A popular noninvasive PTT estimate for this application is the time delay between ECG and photoplethysmography (PPG) waveforms (pulse arrival time [PAT]). Another estimate is the time delay between proximal and distal PPG waveforms (PPG-PTT)...
May 2016: Physiological Reports
George S Stergiou, Gianfranco Parati, Charalambos Vlachopoulos, Apostolos Achimastos, Emanouel Andreadis, Roland Asmar, Alberto Avolio, Athanase Benetos, Grzegorz Bilo, Nadia Boubouchairopoulou, Pierre Boutouyrie, Paolo Castiglioni, Alejandro de la Sierra, Eamon Dolan, Geoffrey Head, Yutaka Imai, Kazuomi Kario, Anastasios Kollias, Vasilis Kotsis, Efstathios Manios, Richard McManus, Thomas Mengden, Anastasia Mihailidou, Martin Myers, Teemu Niiranen, Juan Eugenio Ochoa, Takayoshi Ohkubo, Stefano Omboni, Paul Padfield, Paolo Palatini, Theodore Papaioannou, Athanasios Protogerou, Josep Redon, Paolo Verdecchia, Jiguang Wang, Alberto Zanchetti, Giuseppe Mancia, Eoin O'Brien
Office blood pressure measurement has been the basis for hypertension evaluation for almost a century. However, the evaluation of blood pressure out of the office using ambulatory or self-home monitoring is now strongly recommended for the accurate diagnosis in many, if not all, cases with suspected hypertension. Moreover, there is evidence that the variability of blood pressure might offer prognostic information that is independent of the average blood pressure level. Recently, advancement in technology has provided noninvasive evaluation of central (aortic) blood pressure, which might have attributes that are additive to the conventional brachial blood pressure measurement...
September 2016: Journal of Hypertension
Willem J Verberk, Hao-Min Cheng, Li-Chih Huang, Chia-Ming Lin, Yao-Pin Teng, Chen-Huan Chen
Accumulating evidence indicates that central blood pressure (CBP) is a better cardiovascular risk predictor than brachial blood pressure (BP). Although more additional benefits of CBP-based treatment above usual hypertension treatment are to be demonstrated, the demand for implementing CBP assessment in general clinical practice is increasing. For this, the measurement procedure must be noninvasive, easy to perform, and cost- and time-efficient. Therefore, oscillometric devices with the possibility to assess CBP seem the best option...
April 2016: Pulse (Basel, Switzerland)
Nicholas Cauwenberghs, Tatiana Kuznetsova
BACKGROUND: The noninvasive assessment of renal hemodynamics is currently possible by assessing the renal resistive index (RRI) derived from intrarenal Doppler arterial waveforms as (peak systolic velocity - end-diastolic velocity)/peak systolic velocity. In this review, we outline the important determinants of the RRI to clarify the true identity of the RRI and highlight its potential diagnostic and prognostic value in renal and cardiovascular pathology. SUMMARY: Although the RRI was initially considered to reflect intrarenal vascular pathological processes, this index is actually a product of a complex interaction between renal and systemic vascular wall properties and hemodynamic factors...
April 2016: Pulse (Basel, Switzerland)
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