scholarly journals Associations between Intrinsic Heart Rate, P Wave and QT Interval Durations and Pulse Wave Analysis in Patients with Hypertension and High Normal Blood Pressure

2020 ◽  
Vol 17 (12) ◽  
pp. 4350
Author(s):  
Ioana Mozos ◽  
Cristina Gug ◽  
Costin Mozos ◽  
Dana Stoian ◽  
Marius Pricop ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Qt Interval ◽  
Pulse Wave ◽  
Pulse Wave Analysis ◽  
P Wave ◽  
Normal Blood Pressure ◽  
Wave Analysis ◽  
Wave Duration ◽  
P Wave Duration

The present study aimed to explore the relationship between electrocardiographic (ECG) and pulse wave analysis variables in patients with hypertension (HT) and high normal blood pressure (HNBP). A total of 56 consecutive, middle-aged hypertensive and HNBP patients underwent pulse wave analysis and standard 12-lead ECG. Pulse wave velocity (PWV), heart rate, intrinsic heart rate (IHR), P wave and QT interval durations were as follows: 7.26 ± 0.69 m/s, 69 ± 11 beats/minute, 91 ± 3 beats/minute, 105 ± 22 mm and 409 ± 64 mm, respectively. Significant correlations were obtained between PWV and IHR and P wave duration, respectively, between early vascular aging (EVA) and P wave and QT interval durations, respectively. Linear regression analysis revealed significant associations between ECG and pulse wave analysis variables but multiple regression analysis revealed only IHR as an independent predictor of PWV, even after adjusting for blood pressure variables and therapy. Receiver-operating characteristic (ROC) curve analysis revealed P wave duration (area under curve (AUC) = 0.731; 95% CI: 0.569–0.893) as a predictor of pathological PWV, and P wave and QT interval durations were found as sensitive and specific predictors of EVA. ECG provides information about PWV and EVA in patients with HT and HNBP. IHR and P wave durations are independent predictors of PWV, and P wave and QT interval may predict EVA.

scholarly journals The Effect of Dipping Tobacco on Pulse Wave Analysis among Adult Males

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Areeg E. Elemam ◽  
Nisreen D. Omer ◽  
Neima M. Ibrahim ◽  
Ahmed B. Ali
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Pulse Wave ◽  
Pulse Wave Analysis ◽  
Control Group ◽  
Study Group ◽  
Adult Males ◽  
Wave Analysis ◽  
Increased Risk ◽  
Wall Stiffness

Background. The current study investigated the effect of dipping tobacco (DT) use on arterial wall stiffness which is a known marker of increased risk of cardiovascular events. Methods. A case-control study which included 101 adult males was carried out in Al-Shaab Teaching Hospital. Blood pressure and pulse wave analysis parameters were recorded in 51 DT users (study group) before and after 30 minutes of placing tobacco and in 50 nontobacco users (control group). Anthropometric measurements were collected using data collection sheet. Data were entered into a computer and analyzed by using the software Statistical Package for the Social Sciences (SPSS) version 20 (SPSS Inc., Chicago, IL, USA). Results. At baseline measurements, heart rate (HR) was significantly lower in the study group compared to the control group ( 66.15 ± 9.21 vs. 72.87 ± 10.13 beats/min; P value ≤ 0.001). Subendocardial viability ratio (SEVR) was significantly higher in the study group compared to the control group ( 203.44 ± 30.34 vs. 179.11 ± 30.51 % ; P value ≤ 0.001). Acute effects of DT compared to pretobacco dipping showed significant increase in HR ( 72.50 ± 10.89 vs. 66.15 ± 9.21 beats/min; P value ≤ 0.001) and significant decrease in augmentation pressure (AP) (4.30 (2.30-8.00) vs. 3.30 (0.60-6.3) mmHg; P value ≤ 0.001), ejection duration (ED) ( 271.65 ± 19.42 vs. 279.53 ± 20.47   ms ; P value ≤ 0.001), and SEVR ( 187.11 ± 29.81 vs. 203.44 ± 30.34 ; P value ≤ 0.001). Linear regression analysis for AP predictor showed that only HR and AIx@75 affect and predict the values of AP ( Beta ± SE ; − 0.242 ± 0.019 , P value ≤ 0.001; 0.685 ± 0.014 , P value ≤ 0.001). Conclusions. Long-term use of DT was not associated with permanent changes in heart rate and blood pressure. Acute tobacco dipping caused an acute increase in heart rate and oxygen demands of myocardium.

scholarly journals Cardiotoxicity Study of the Aqueous Extract of Corn Silk in Rats

2016 ◽  
Vol 39 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Adeolu Adedapo ◽  
Omotayo Babarinsa ◽  
Ademola Oyagbemi ◽  
Aduragbenro Adedapo ◽  
Temidayo Omobowale
Keyword(s):  
Heart Rate ◽  
Qt Interval ◽  
Fatty Infiltration ◽  
P Wave ◽  
Control Group ◽  
Histopathological Changes ◽  
Oral Antidiabetic Agent ◽  
Wave Duration ◽  
Corn Silk ◽  
P Wave Duration

AbstractIn the ear of corn there are silky strands which run its length and these strands are known as corn silks. Folk remedies show that the corn silks have been used as an oral antidiabetic agent in China for many years and as herbal tea in other world nations for the amelioration of urinary tract infection. The extract is being assessed for safety in this study using histopathological changes, as well as an electrocardiogram (ECG). Graded doses (200, 400 and 800 mg/kg) of aqueous CS extract were administered to rats for seven days. The fourth group which served as control received 3 ml/kg dose of distilled water. On the eighth day, ECG was evaluated in ketamine/xylazine-induced anaesthesia in rats to determine changes in the heart rate, P-wave duration, P-R interval, R-amplitude, QRS duration, QT interval and QTc. Hearts from the experimental animals were collected for histopathological changes. The results showed that there was a significant change in the heart rate (groups B and C), P-wave duration (group D), QT interval (groups B, C and D) and QTc (groups B, C and D) when compared to the control group. Histology also indicated that sections of the heart showed fatty infiltration of inflamed heart and areas of moderate inflammation of the atrium and ventricle. It could therefore be concluded from this study that though folklore indicated that corn silk (CS) is of high medicinal value, one must be careful in using this product as medicinal agent especially in patients with compromised heart conditions.

Abstract P116: VARIATION IN MEAN ARTERIAL PRESSURE (MAP) AND ITS HEMODYNAMIC COMPONENTS DURING 24-HOUR AMBULATORY PULSE WAVE ANALYSIS: IMPACT OF AGE, RACE, GENDER AND BODY SIZE

Hypertension ◽  
2021 ◽  
Vol 78 (Suppl_1) ◽  
Author(s):  
Sagar Nagpal ◽  
Debduti Mukhopadhyay ◽  
Peter Osmond ◽  
Joseph E Schwartz ◽  
Joseph L Izzo
Keyword(s):  
Heart Rate ◽  
Pulse Wave ◽  
Beta Blockers ◽  
Demographic Characteristics ◽  
Pulse Wave Analysis ◽  
Clinical Implications ◽  
Wave Analysis ◽  
Contributing Factors ◽  
Clinical Associations ◽  
The Impact

BP is highly variable within and between individuals but the impact of variation in underlying hemodynamic components is unknown. We tested the feasibility and clinical associations of quantitated variances in MAP and its hemodynamic components [heart rate (HR), stroke volume (SV) and total vascular resistance (TVR)] obtained by 24-hr ambulatory pulse wave analysis (PWA, Mobil-O-Graph, IEM, Stolzberg, DE). BP and PWA were measured every 20 min for 24 hrs. Indexed to body surface area, MAP = HR*[SV index (SVI)]*[TVR index (TVRI)]; ln(MAP) = ln(HR) + ln(SVI) + ln(TVRI); and total MAP variability = var [ln(MAP)] = covariance (cov)[ln(HR), ln(MAP)] + cov[ln(SVI), ln(MAP)] + cov[ln(TVRI), ln(MAP)]. Relative contributions to var[ln(MAP)] for each hemodynamic component (as %) were calculated and associations with demographic characteristics were analyzed by correlations and t-tests. We studied 152 people (49% women, 23% black); mean(SD): # readings 57(11), age 59(16) yr, BMI 29.9(6.5) kg/m 2 , systolic BP 135(18) and MAP 106(14) mmHg. Mean(SD) 24-hr values were: ln(MAP) 4.64 (0.13), ln(HR) 4.20 (0.15), ln(SVI) -3.32 (0.15), and ln(TVRI) 3.75 (0.18). Relative contributions of hemodynamic components to total 24-hr ln(MAP) variation were: TVRI 54(36)%, HR 33(38)%, and SVI 13(40)%. The large SDs of these relative contributions led to analysis of potential contributing factors: TVRI contribution was correlated with 24-hr mean MAP (r=0.24, p=0.003) and was higher (>54%) in males (p=0.03) and blacks (p=0.04); HR contribution was inversely related to MAP (r=-0.26, p=0.001), age (r=-0.29, p=0.0003) and BMI (r=-0.173 p=0.05) and was lower (<33%) in blacks (p=0.008); SVI contribution was correlated with age (r=0.31, p<0.0001) and BMI (r=0.23, p=0.005) and was higher (>13%) in women (p=0.03). We conclude that 24-hr ambulatory PWA can identify components of MAP variation within individuals and their associations with demographic factors. The relative contributions of hemodynamic components (HR, SV, TVR) to 24-hr variability in ln(MAP) varies systematically with 24-hr mean MAP, age, race, gender, and BMI. Theoretical clinical implications may include therapeutic adjustments for extremes of variation in HR (beta-blockers), TVR (vasodilators) or SV (diuretics).

Acute Cardiovascular Responses to Self-selected Intensity Exercise in Parkinson's Disease

2021 ◽  
Author(s):  
Hélcio Kanegusuku ◽  
Gabriel Grizzo Cucato ◽  
Paulo Longano ◽  
Erika Okamoto ◽  
Maria Elisa Pimentel Piemonte ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Parkinson’S Disease ◽  
Heart Rate ◽  
Parkinson's Disease ◽  
Pulse Wave ◽  
Augmentation Index ◽  
Cardiovascular Responses ◽  
Cycle Ergometer ◽  
Control Session ◽  
Wave Analysis

AbstractParkinson’s disease patients frequently present cardiovascular dysfunction. Exercise with a self-selected intensity has emerged as a new strategy for exercise prescription aiming to increase exercise adherence. Thus, the current study evaluated the acute cardiovascular responses after a session of aerobic exercise at a traditional intensity and at a self-selected intensity in Parkinson’s disease patients. Twenty patients (≥ 50 years old, Hoehn & Yahr 1–3 stages) performed 3 experimental sessions in random order: Traditional session (cycle ergometer, 25 min, 50 rpm, 60–80% maximum heart rate); Self-selected intensity: (cycle ergometer, 25 min, 50 rpm with self-selected intensity); and Control session (resting for 25 min). Before and after 30 min of intervention, brachial and central blood pressure (auscultatory method and pulse wave analysis, respectively), cardiac autonomic modulation (heart rate variability), and arterial stiffness (pulse wave analysis) were evaluated. Brachial and central systolic and diastolic blood pressure, heart rate, and the augmentation index increased after the control session, whereas no changes were observed after the exercise sessions (P<0.01). Pulse wave velocity and cardiac autonomic modulation parameters did not change after the three interventions. In conclusion, a single session of traditional intensity or self-selected intensity exercises similarly blunted the increase in brachial and central blood pressure and the augmentation index compared to a non-exercise control session in Parkinson’s disease patients.

scholarly journals CROSSTALK BETWEEN INTRINSIC HEART RATE AND PULSE WAVE ANALYSIS IN SMOKERS

2021 ◽  
Vol 39 (Supplement 1) ◽  
pp. e279
Author(s):  
Ioana Mozos ◽  
Daniela Jianu ◽  
Costin Mozos ◽  
Cristina Gug ◽  
Dana Stoian
Keyword(s):  
Heart Rate ◽  
Pulse Wave ◽  
Pulse Wave Analysis ◽  
Wave Analysis ◽  
Intrinsic Heart Rate

scholarly journals Electrocardiographic parameters in captive, clinically healthy, Amazona ochrocephala

2015 ◽  
pp. 5037-5045
Author(s):  
Claudia Guerrero S ◽  
Janeth Bolivar B ◽  
Piero Vargas-Pinto ◽  
Pedro Vargas-Pinto ◽  
Claudia Brieva-Rico
Keyword(s):  
Heart Rate ◽  
Wave Amplitude ◽  
P Wave ◽  
S Wave ◽  
Wave Duration ◽  
T Wave ◽  
P Wave Duration ◽  
Electrocardiographic Examination ◽  
Qrs Duration ◽  
Electrocardiographic Parameters

ABSTRACT Objective. To stablish the electrocardiographic parameters of individuals of the species Amazona ochrocephala, from the Unidad de Rescate y Rehabilitacion de Animales Silvestres at the Universidad Nacional de Colombia. Materials and methods. The electrocardiographic examination was performed under inhaled anesthesia with isoflurane. Leads I, II, III, aVL, aVR and aVF were measured. Results. Electrocardiographic parameters obtained in Lead II. P wave Duration: 0.015-0.044 s, P wave amplitude: 0.031 to 0.6 mv, R wave duration: 0.015-0.022 s, amplitude R: 0.034-0.038 mv, S wave Duration: 0.019- 0.042 s, amplitude S: 0.194-0.815 mv, T wave Duration: 0.025-0.064 s, T-wave amplitude: 0.010 to 0.5 mv, PQ Duration: 0.021-0.076 s, QRS Duration: 0.036-0.068 s, QT Duration: 0.070-0.015 s, RR Duration: 0.104-0.324 s, EEM: -111° to -80°, FC: 240-600 ppm. Conclusions. The results showed different values for amplitude and duration of the P, R and T waves in comparison to those obtained in other studies. However, they were similar for heart rate, MEA and duration of the PQ/R, QT and QRS segments.

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