The Effects of Advancing Gestation on Maternal Autonomic Response

Author(s):  
Maretha Bester ◽  
Rohan Joshi ◽  
Massimo Mischi ◽  
Judith O E H van Laar ◽  
Rik Vullings
Keyword(s):  
2006 ◽  
Author(s):  
George A. Bonanno ◽  
Karin G. Coifman
Keyword(s):  

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
A Sharp ◽  
C Patient ◽  
J Pickett ◽  
M Belham

Abstract Background The syndrome of inappropriate sinus tachycardia (IST) is well recognized and affects ∼1% of the population. We believe IST in pregnancy is a relatively frequent yet under-recognized phenomenon that may represent a distinct arrhythmia. To date, there are only three case reports in the literature. Purpose To further understand the natural history of IST in pregnancy, and to explore maternal outcomes. Methods A retrospective, observational cohort analysis. Results 19 pregnant women presented to our institute with a definitive diagnosis of IST (as defined by task force criteria) between January 2016 and January 2017. Symptom onset was 4–36 weeks gestation (mean 20 weeks). Of those in their second or subsequent pregnancy (n=8), 50% described symptoms compatible with IST in previous pregnancies. 42% attended the emergency department on ≥1 occasion with symptoms of IST. 32% required hospital admission. 26% required pharmacological therapy (beta-blockers in all). There were no maternal deaths, instances of heart failure or acute coronary syndrome, no thromboembolic or haemorrhagic complications during pregnancy. Rates of Caesarean section were similar to the background rate of our unit; however, rates of induction were notably elevated (58% vs 25%), with 55% of these women being induced purely for symptoms of IST. Following delivery, symptoms resolved within one week for 17 of the women in the cohort, 1 had symptoms resolve after 4 month and 1 had persistent symptoms as she became pregnant again. Conclusion IST in pregnancy likely represents a distinct arrhythmia; the majority of individuals here had symptoms only during pregnancy, which resolved rapidly postpartum. Additionally, half of the women in a second or subsequent pregnancy had suffered IST symptoms during previous pregnancies, with no symptoms in between pregnancies. It is biologically plausible and may represent an exaggerated cardio-autonomic response to the physiological changes of pregnancy such as increased sympathetic tone and change in baroreceptor reflex sensitivity. Recognition of the condition is important given it is associated with significant morbidity, the distressing nature of symptoms leading to high rates of hospitalization and induction of labour. Funding Acknowledgement Type of funding source: None


2020 ◽  
pp. 1-26
Author(s):  
Marie N Teisen ◽  
Stine Vuholm ◽  
Jesper M Rantanen ◽  
Jeppe H Christensen ◽  
Camilla T Damsgaard ◽  
...  

Abstract Long-chain n-3 PUFA (n-3 LCPUFA) have been shown to reduce blood pressure, heart rate and vagal tone, but potential stress-mitigating effects of n-3 LCPUFA are not well investigated. We aim to explore the effects of oily fish consumption on long-term stress and the stress response in schoolchildren. Healthy 8-9-year-old children were randomized to receive ~300 g/week of oily fish or poultry for 12 ± 2 weeks. At baseline and endpoint, we measured erythrocyte n-3 LCPUFA, hair cortisol and the response to a 1-min cold pressor test (CPT) on saliva cortisol, blood pressure, and continuous electrocardiogram recordings. Of the 199 randomized children, 197 completed the trial. Hair cortisol did not differ between the groups, but a sex-interaction was indicated (Psex*group = 0.074, difference between means -0.9 (95% CI: -2.9,1.0) ng/g and 0.7 (-0.2,1.6) ng/g in boys and girls, respectively). The children in the fish group tended to be less prone to terminate CPT prematurely (OR 0.20 [0.02,1.04]). The mean heart beat interval during CPT was 18.2 (0.3,36.6) ms longer and the high frequency power increased (159 (29,289) ms2) in the fish versus the poultry group. The cardiac autonomic response in the 10 min following CPT was characterized by a sympathetic peak followed by a parasympathetic peak, which was most pronounced in the fish group. This exploratory study does not support a strong effect of oily fish consumption on stress, but indicates that oily fish consumption may increase vagal cardiac tone during the physiological response to CPT. These results warrant further investigation.


2007 ◽  
Vol 2 (3) ◽  
pp. 216-221 ◽  
Author(s):  
M. A. Wenger ◽  
B. T. Engel ◽  
T. L. Clemens

2021 ◽  
Vol 231 ◽  
pp. 102772
Author(s):  
Fernanda Ribeiro Marins ◽  
Marcelo Limborço-Filho ◽  
Carlos Henrique Xavier ◽  
Silvia Guatimosim ◽  
Marco Antônio Peliky Fontes

1972 ◽  
Vol 9 (3) ◽  
pp. 318-333 ◽  
Author(s):  
D. T. Lykken ◽  
I. Macindoe ◽  
A. Tellegen
Keyword(s):  

Author(s):  
Luigi Isaia Lecca ◽  
Gabriele Marcias ◽  
Michele Uras ◽  
Federico Meloni ◽  
Nicola Mucci ◽  
...  

Airport activity causes the emission of particulate matter and noise, two environmental contaminants and potential health hazards, particularly for the personnel operating nearby taxiways. We explored the association between exposure to fine/ultrafine particles (UFPs) and noise with heart rate variability (HRV), an early indicator of cardiovascular autonomic response, among a sample of airport ground staff. Between May and June 2018, thirty-four male operators (mean age = 43 years and SD = 6.7) underwent personal monitoring of exposure to nanoparticles and noise, and HRV during their work activity. We conducted univariate and multivariate analysis to test the effect of UFP and noise exposure HRV. Total Lung Deposition Surface Area (LDSA) was significantly associated with a decrease in HRV Total Power and Triangular index (β = −0.038 p = 0.016 and β = −7.8 × 10−5, p = 0.042, respectively). Noise peak level showed an opposite effect, which was significant for Total Power (β = 153.03, p = 0.027), and for Triangular index (β = 0.362, p = 0.035). Further investigation is warranted to clarify the effect of the concurrent exposure to UFPs and noise on early changes of cardiac autonomic regulation.


Retos ◽  
2021 ◽  
Vol 42 ◽  
pp. 323-330
Author(s):  
Jorge Olivares Arancibia ◽  
Patricio Solis-Urra ◽  
Felipe Porras-López ◽  
Inti Federeci-Díaz ◽  
Fernando Rodríguez-Rodríguez ◽  
...  

  In the last years the nervous and cardiovascular response to exercise has taken on an important relevance, both in sport and health field. In this line, accelerating cardiovascular appears to play a key role in various sports fields. The study aims to examine and compare the acute effect of whole-body vibration (WBV) on cardiac autonomic response after maximal exercise in university runners and physical education student. Twenty men participated in a cross-over study, 10 university runners team (UR) and 10 physical education student (PES) with ages around 18 to 24 years. In each condition, was perform an incremental cardiopulmonary exercise test followed (i) active recovery time using WBV (25 Hz and peak displacement of four mm) and (ii) passive recovery period (no WBV; 0 Hz—0 mm), separated by seven days. Active recovery consisted in one minute seated using WBV and one minute no WBV by six times (12 minutes) more five minutes of passive recovery, and passive recovery consisted in 17 min seated on platform without vibration. Active recovery had significant differences compare to passive recovery (P<0.05). Furthermore, in active recovery, PES had better heart rate response than UR group, however results were not significative. There was not a clear relation between the lineal components of heart rate variability (HRV) in our results. WBV has positive effect in participant’s recovery, however, is necessary establish protocols about the intensities and time adequate for allow accelerate recovery the parasympathetic reactivity, for that reason yet can’t conclude clearly respect to the more effectivity intensity WBV depending to characteristic of subject.  Resumen. En los últimos años la respuesta nerviosa y cardiovascular al ejercicio ha adquirido una relevancia importante, tanto en el ámbito del deporte como de la salud. Por tanto, la aceleración de la recuperación cardiovascular parece desempeñar un papel clave en varios campos. El objetivo del estudio es analizar y comparar el efecto agudo de la vibración de cuerpo completo (VCC), en la respuesta cardíaca autónoma después del ejercicio máximo en corredores universitarios (CU) y estudiantes de educación física (EEF). Veinte hombres participaron en un estudio cruzado, 10 CU y 10 EEF con edades entre 18 y 24 años. En cada evaluación, se realizó una prueba cardiopulmonar incremental seguida de (i) tiempo de recuperación activa usando VCC (25 Hz y desplazamiento máx. de cuatro mm) y (ii) período de recuperación pasiva (sin VCC; 0 Hz — 0 mm), separados por siete días. La recuperación activa consistió en un minuto sentado usando WBV y un minuto sin WBV seis veces (12 min), más cinco minutos de recuperación pasiva; la recuperación pasiva y esta consistió en 17 minutos sentado en plataforma sin vibración. La recuperación activa tuvo diferencias significativas en comparación con recuperación pasiva (p <0.05). Además, en recuperación activa, EEF tuvo una mejor respuesta de frecuencia cardíaca que el grupo CU, sin embargo, los resultados no fueron significativos. Por último, no se logró establecer una relación clara entre los componentes lineales de la variabilidad del ritmo cardiaco (VRC) en nuestros resultados. La VCC tiene un efecto positivo en la recuperación de los sujetos, sin embargo, es necesario establecer protocolos sobre las intensidades y tiempo adecuado para permitir acelerar la recuperación de la reactividad parasimpática, por esa razón aún no se puede concluir claramente respecto al mejor protocolo VVC dependiendo de la característica del sujeto.


CHEST Journal ◽  
2021 ◽  
Vol 160 (4) ◽  
pp. A787
Author(s):  
Justyna Michalik ◽  
Magdelene Amoateng ◽  
Robbert Crusio

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