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noninvasive central blood pressure

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https://www.readbyqxmd.com/read/29137091/the-effects-of-hypervolemic-infusion-on-microcirculation-perfusion-of-patients-during-laparoscopic-colorectal-surgery
#1
Yunxin Deng, Qianlin Zhu, Buwei Yu, Minhua Zheng, Jue Jin
The aim of this study is to assess the effects of hypervolemic infusion with different solutions on microcirculation perfusion during laparoscopic colorectal surgery.Thirty-six patients were randomly divided into Ringer lactate solution [RL] group, succinylated gelatin injection [Gel] group, and hypertonic saline hydroxyethyl starch 40 injection [HS] group. Hypervolemic infusion was performed during the induction period of general anesthesia. Arterial blood-gas parameters, noninvasive hemodynamics, gastric tonometry values, and central venous pressure (CVP) were compared at baseline (T1); the end of hypervolemic infusion (T2); 5 min (T3), 15 min (T4), 30 min (T5), and 60 min (T6) during pneumoperitoneum; 5 min (T7), 15 min (T8), and 25 min (T9) after pneumoperitoneum...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29113716/plethysmography-variability-index-for-prediction-of-fluid-responsiveness-during-graded-haemorrhage-and-transfusion-in-sevoflurane-anaesthetized-mechanically-ventilated-dogs
#2
Yusuke Endo, Koudai Kawase, Taku Miyasho, Tadashi Sano, Kazuto Yamashita, William W Muir
OBJECTIVE: To examine the accuracy of plethysmography variability index (PVI) as a noninvasive indicator of fluid responsiveness in hypovolaemic dogs. STUDY DESIGN: Prospective experimental study. ANIMALS: Six adult healthy sevoflurane-anaesthetized Beagle dogs. METHODS: Dogs were anaesthetized with 1.3-fold their individual minimum alveolar concentration of sevoflurane. The lungs were mechanically ventilated after neuromuscular blockade with vecuronium bromide...
August 25, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29084016/validation-of-a-new-piezoelectric-device-for-noninvasive-measurement-of-central-aortic-systolic-blood-pressure
#3
Paula E Cuffaro, Margarita S Morales, Jessica Barochiner, Marcelo A Rada, José Alfie, Lucas S Aparicio, Carlos R Galarza, Rubén G Micali, Marcos J Marin, Gabriel D Waisman
OBJECTIVE: The objective of this study was to compare the aortic piezoelectric device for noninvasive measurement of central aortic systolic blood pressure (cSBP) with the SphygmoCor. PARTICIPANTS AND METHODS: A total of 85 participants from both sexes, aged 18-80 years, were stratified into three age groups (<30, 30-60, >60 years), with an equal number of healthy volunteers and hypertensive patients. We performed three cSBP measurements with each device, in an alternate manner, using the Bland-Altman method to determine the level of agreement...
October 27, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/29081017/validation-of-central-and-peripheral-non-invasive-hemodynamic-variables-using-an-oscillometric-method
#4
Darío Echeverri, Alejandro Pizano, Jaime Cabrales, Karen Moreno
INTRODUCTION: Peripheral and central blood pressures are parameters of arterial stiffness and important cardiovascular risk markers. Today, there are non-invasive methods that measure these pressures. AIM: To validate the non-invasive oscillometric method, compared with invasive pressure measurements obtained by cardiac catheterization. METHODS: An open, prospective cohort clinical study in 100 patients, 64 ± 11 years old. The measurement of peripheral and central blood pressures obtained using the Arteriograph(®) system oscillometric method, (TensioMed, Budapest-Hungary, Ltd...
October 28, 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/29080692/the-association-between-brain-derived-neurotrophic-factor-and-central-pulse-pressure-after-an-oral-glucose-tolerance-test
#5
I-Te Lee, Chen-Huan Chen, Jun-Sing Wang, Chia-Po Fu, Wen-Jane Lee, Kae-Woei Liang, Shih-Yi Lin, Wayne Huey-Herng Sheu
BACKGROUND: Arterial stiffening blunts postprandial vasodilatation. We hypothesized that brain-derived neurotrophic factor (BDNF) may modulate postprandial central pulse pressure, a surrogate marker for arterial stiffening. METHODS: A total of 82 non-diabetic subjects received a 75-g oral glucose tolerance test (OGTT) after overnight fasting. Serum BDNF concentrations were determined at 0, 30, and 120min to calculate the area under the curve (AUC). Brachial and central blood pressures were measured using a noninvasive central blood pressure monitor before blood withdrawals at 0 and 120min...
November 10, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29049241/evaluation-of-the-reduction-in-central-and-peripheral-arterial-blood-pressure-following-an-oral-glucose-load
#6
Shunsuke Murai, Hiroyuki Takase, Tomonori Sugiura, Sumiyo Yamashita, Nobuyuki Ohte, Yasuaki Dohi
The clinical significance of measuring central arterial blood pressure has been recently discussed. Although the postprandial reduction in blood pressure is well known, postprandial changes in central blood pressure have not been intensively studied. The present study investigated differences in the reduction of central and peripheral arterial blood pressure after administration of an oral glucose load.An oral glucose tolerance test (75 g) was performed in 360 participants in our physical checkup program...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29016531/myocardial-preload-alters-central-pressure-augmentation-through-changes-in-the-forward-wave
#7
Lennart van de Velde, Daan W Eeftinck Schattenkerk, Pascale A H T Venema, Hendrik J Best, Bas van den Bogaard, Wim J Stok, Berend E Westerhof, Bert Jan H van den Born
OBJECTIVE: Augmentation index (AIx) is often used to quantify the contribution of wave reflection to central pulse pressure. Recent studies have challenged this view by showing how contractility-induced changes in the forward pressure wave can markedly impact AIx. We hypothesized that changes in preload will also affect AIx through changes in the forward wave and studied this in two experiments. METHODS: Noninvasively obtained aortic pressure was used to study central haemodynamics and wave morphology...
October 7, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28978987/validity-of-the-augmentation-index-and-pulse-pressure-amplification-as-determined-by-the-sphygmocor-xcel-device-a-comparison-with-invasive-measurements
#8
Atsushi Nakagomi, Toshihiro Shoji, Sho Okada, Yuji Ohno, Yoshio Kobayashi
Augmentation index (AIx) and pulse pressure (PP) amplification can be determined by the SphygmoCor XCEL device in an operator-independent manner. This study aimed to examine its validity against invasive measurements. Simultaneous recordings of central aortic pressure waveforms were performed with oscillometric and high-fidelity invasive methods in 35 patients who underwent coronary arteriography. Brachial blood pressure was also recorded using the two methods. AIx for the aortic pressure waveform was defined as the ratio of augmentation pressure to PP...
October 5, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28911022/hypertensive-cardiovascular-risk-pulsatile-hemodynamics-gender-and-therapeutic-implications
#9
Michel E Safar, Harold Smulyan
PURPOSE: In recent years, the predictive value of 2 pulsatile parameters has been extensively studied in hypertension: aortic stiffness and pulse pressure (PP) amplification. Aortic stiffness is an index of aortic rigidity and PP-amplification is the ratio between central and brachial PP, an indirect evaluation of wave reflections. Both are safe, independent, noninvasive predictors of overall and cardiovascular risk. Our purpose is to determine the validity of these parameters in 2 different circumstances: gender and therapeutic implications...
October 1, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28740096/associations-of-plasma-homocysteine-levels-with-peripheral-systolic-blood-pressure-and-noninvasive-central-systolic-blood-pressure-in-a-community-based-chinese-population
#10
Mohetaboer Momin, Fangfang Fan, Jianping Li, Xianhui Qin, Jia Jia, Litong Qi, Yan Zhang, Yong Huo
Previous studies indicated that homocysteine (Hcy) is associated with higher peripheral systolic blood pressure (pSBP). There have been few data on the relationship between Hcy and central SBP (cSBP). A total of 4,364 Chinese subjects from the Shijingshan community in Beijing were included. cSBP and pSBP were measured with an Omron HEM-9000AI device. Subjects were 57.20 ± 8.9 years old, 37.9% were male. The median of Hcy was 11.96 μmol/L. The mean of cSBP and pSBP was 129.94 ± 18.03 mmHg and 133...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28690161/ultrasound-targeted-cns-gene-delivery-for-parkinson-s-disease-treatment
#11
REVIEW
Ching-Hsiang Fan, Chung-Yin Lin, Hao-Li Liu, Chih-Kuang Yeh
Parkinson's disease (PD) is a potent neurodegenerative disease in which a progressive loss of dopaminergic neurons eventually produces a loss of movement control and other symptoms. To date, in addition to pharmacological, non-pharmacological, and neurosurgical therapies, gene delivery has emerged as a potential therapeutic modality for PD. Effective targeted gene delivery is complicated in that gene vectors cannot penetrate the blood-brain barrier (BBB), thus clinical tests must rely on invasive intracerebral gene vector injection...
September 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28665886/ablation-of-toll-like-receptor-4-mitigates-central-blood-pressure-response-during-hyperhomocysteinemia
#12
Nevena Jeremic, Gregory J Weber, Anastasia Familtseva, Naira Metreveli, Suresh C Tyagi
OBJECTIVE: The objective of this study was to define the mechanisms of homocysteine-induced effects on the aortic wall that promote vascular remodeling and hypertension as well as explore the role of Toll-like receptor 4 in homocysteine-induced effects. METHOD: Five strains of mice were utilized in this study: C57BL/6J, C3H/HeOuJ, CBS+/-, C3H/HeJ and CBS+/-/C3H. Aorta, heart and blood were collected at the end of the experiments. Blood pressure (BP) was recorded using noninvasive tail cuff method...
November 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28655735/tail-cuff-technique-and-its-influence-on-central-blood-pressure-in-the-mouse
#13
Elena Wilde, Aisah A Aubdool, Pratish Thakore, Lineu Baldissera, Khadija M Alawi, Julie Keeble, Manasi Nandi, Susan D Brain
BACKGROUND: Reliable measurement of blood pressure in conscious mice is essential in cardiovascular research. Telemetry, the "gold-standard" technique, is invasive and expensive and therefore tail-cuff, a noninvasive alternative, is widely used. However, tail-cuff requires handling and restraint during measurement, which may cause stress affecting blood pressure and undermining reliability of the results. METHODS AND RESULTS: C57Bl/6J mice were implanted with radio-telemetry probes to investigate the effects of the steps of the tail-cuff technique on central blood pressure, heart rate, and temperature...
June 27, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28623932/impact-of-glycemic-control-on-aortic-stiffness-left-ventricular-mass-and-diastolic-longitudinal-function-in-type-2-diabetes-mellitus
#14
Michaela Kozakova, Carmela Morizzo, Alan G Fraser, Carlo Palombo
BACKGROUND: Poor glycemic control is associated with impaired left ventricular (LV) diastolic function in patients with type 2 diabetes mellitus (T2DM). Inappropriate LV mass increase and accelerated aortic stiffening were suggested to participate on deterioration of diastolic function. The present study investigated the inter-relationships between glycemic control, early diastolic and systolic longitudinal velocity of mitral annulus, LV mass and aortic stiffness in T2DM patients free of cardiovascular disease and with preserved LV ejection fraction, and compared them with those observed in healthy volunteers of similar age and sex distribution...
June 17, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28614093/central-diastolic-pressure-decay-mediates-the-relationship-between-aortic-stiffness-and-myocardial-viability-potential-implications-for-aortosclerosis-induced-myocardial-ischemia
#15
Junichiro Hashimoto, Sadayoshi Ito
OBJECTIVE: Stiffening of the aorta often precedes coronary events, but little is known about the aetiological mechanism. We hypothesized that the predisposition to myocardial ischemia could be attributable to aortosclerosis-induced alterations in the central haemodynamics during diastole. METHODS: Using noninvasive tonometry and ultrasonography, we investigated the arterial pressure pulse waveforms, pulse wave velocities (PWVs) and compliance in 222 patients with hypertension...
June 16, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28603219/central-hemodynamics-for-management-of-arteriosclerotic-diseases
#16
Junichiro Hashimoto
Arteriosclerosis, particularly aortosclerosis, is the most critical risk factor associated with cardiovascular, cerebrovascular, and renal diseases. The pulsatile hemodynamics in the central aorta consists of blood pressure, flow, and stiffness and substantially differs from the peripheral hemodynamics in muscular arteries. Arteriosclerotic changes with age appear earlier in the elastic aorta, and age-dependent increases in central pulse pressure are more marked than those apparent from brachial pressure measurement...
August 1, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/28601121/relationship-between-subendocardial-viability-ratio-and-hemoglobin-in-patients-with-chronic-kidney-disease
#17
Robert Ekart, Sebastjan Bevc, Nina Hojs, Tina Stropnik Galuf, Martin Hren, Benjamin Dvoršak, Maša Knehtl, Eva Jakopin, Igor Krajnc, Radovan Hojs
AIMS: Pulse wave analysis (PWA) uses the technique of applanation tonometry to obtain a peripheral pulse pressure waveform from which central hemodynamic information is derived. Using PWA, subendocardial viability ratio (SEVR) can be measured. SEVR represents a noninvasive measure of myocardial perfusion. It is related to the work of the heart, the oxygen consumption, and the energy supply of the heart. Anemia is a common complication of chronic kidney disease (CKD). A complex relationship exists between CKD, cardiovascular disease (CVD), and anemia...
2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28590772/arterial-stiffness-in-fertile-women-with-metabolic-syndrome
#18
Tiina Vilmi-Kerälä, Teemu Koivistoinen, Outi Palomäki, Jukka Uotila, Ari Palomäki
INTRODUCTION: Although metabolic syndrome (MetS) is evidently associated with the risk of cardiovascular disease (CVD), recently its use has been questioned. We studied the utility of MetS diagnosis when estimating individual CVD risk. METHODS: We compared 27 fertile women with MetS and 27 counterparts without the syndrome, matched pairwise according to well-known risk factors of CVD. Pulse wave velocity (PWV) and central blood pressure (cBP) were determined noninvasively via a SphygmoCor device...
June 23, 2017: Annals of Medicine
https://www.readbyqxmd.com/read/28570147/estimating-arterial-partial-pressure-of-carbon-dioxide-in-ventilated-patients-how-valid-are-surrogate-measures
#19
Boulos S Nassar, Gregory A Schmidt
The arterial partial pressure of carbon dioxide (PaCO2) is an important parameter in critically ill, mechanically ventilated patients. To limit invasive procedures or for more continuous monitoring of PaCO2, clinicians often rely on venous blood gases, capnography, or transcutaneous monitoring. Each of these has advantages and limitations. Central venous Pco2 allows accurate estimation of PaCO2, differing from it by an amount described by the Fick principle. As long as cardiac output is relatively normal, central venous Pco2 exceeds the arterial value by approximately 4 mm Hg...
June 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28522275/impact-of-continuous-positive-airway-pressure-on-left-ventricular-systolic-loading-and-coronary-flow-reserve-in-healthy-young-men
#20
Volker Schulze, Christian Meyer, Christian Eickholt, Roberto Sansone, Stefanie Keymel, Christian Heiss, Tienush Rassaf, Malte Kelm, Stephan Steiner
BACKGROUND: Increased augmentation index (AIx) is accompanied by an elevated cardiovascular risk. A reduction of AIx is known for long-term continuous positive airway pressure (CPAP) therapy. We hypothesised that acute preload and left ventricular workload effects AIx and subendocardial viability ratio (SEVR) as a marker of coronary flow reserve. METHODS: Increased augmentation index and central blood pressure parameters were measured by radial artery tonometry in 17 healthy men (32/±6years) at rest and during CPAP ventilation at pressures of 5, 10mbar and after recovery...
March 31, 2017: Heart, Lung & Circulation
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