Electrocardiographic findings in pregnant women in Angola

Gonçalves, Mauer; Pedro, João Mário; Silva, Carina; Magalhães, Pedro; Brito, Miguel

doi:10.1111/anec.12980

Cited by 3 publications

(3 citation statements)

References 48 publications

(63 reference statements)

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“…In this study, the HR increased obviously during the late pregnancy in horses, similar to earlier reports in pregnant Warmblood mares [ 37 ], humans [ 1 , 3 , 38 , 39 ] and in dogs [ 12 , 15 , 40 ]. In horses, the breed differences may reflect in maternal HR; the small-size mares had the highest HR compared to the medium-sized and large-sized mares [ 24 ].…”

Section: Discussionsupporting

confidence: 91%

“…A cardiovascular function could be changed for physiological adaptation during pregnancy, including increases in heart rate (HR) [1], cardiac output (CO) [2], and a decrease in maternal systemic vascular resistance associated with the renin-angiotensin-aldosterone system activation [3]. The changes in cardiovascular function associated with pregnancy are relevant to clinical practice because they may be exacerbated in association with cardiovascular diseases, including hypertension [4,5], diabetes mellitus [6], and congenital heart disease [7] and also lead to the development of pre-eclampsia in women [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Effects of pregnancy on electrocardiographic, vasovagal tonus index, and echocardiographic variables in horses

Chompoosan,

Pongthaisong,

Kenchaiwong

et al. 2023

Vet World

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Background and Aim: Pregnancy affects maternal hemodynamics. The changes in autonomic nervous system activity for hemodynamics adaptation in pregnant horses are still unclear. Thus, this study aimed to examine the effect of pregnancy on electrocardiographic, vasovagal tonus index, and echocardiographic variables in horses. Materials and Methods: A total of 23 Thai native crossbred mares without any cardiac abnormalities were included in this study. The animals were assigned into two groups, a non-pregnant mare group (n =12) and a pregnant mare group (n = 11). Electrocardiogram recordings (paper speed = 25 mm/s and calibration = 10 mm/mV) were performed to obtain six limb leads (leads I, II, III, aVR, aVL, and aVF). The vasovagal tonus index (VVTI) was calculated to assess variability in heart rate over short periods using just 20 consecutive beats. Cardiac structure and function were evaluated by echocardiography. Results: Heart rate, P wave duration, PR interval, QRS duration, QT interval, and T wave duration were significantly different between non-pregnant and pregnant horses (p < 0.05). Pregnant horses had significantly lower VVTI than non-pregnant (p < 0.05). There were no significant differences in cardiac structures including % interventricular septum (IVS), % left ventricular posterior wall (LVPW), IVS in diastole, left ventricular internal diameter at end-diastole, LVPW thickness at end-diastole, IVS in systole, left ventricular internal diameter at end-systole, LVPW thickness at end-systole, and left atrium/aortic roots ratio between the two groups. However, the pregnant horses had a significantly higher cardiac output and % ejection fraction than non-pregnant horses (p < 0.05). Conclusion: This study provided the first evidence that hemodynamic adaptations during pregnancy modified cardiac conduction, vasovagal tonus index, and echocardiographic variables in horses. Keywords: echocardiography, electrocardiogram, horses, pregnancy, vasovagal tonus index.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Effects of pregnancy on electrocardiographic, vasovagal tonus index, and echocardiographic variables in horses

Chompoosan,

Pongthaisong,

Kenchaiwong

et al. 2023

Vet World

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“…Previous studies found reduced PR interval in pregnant women without cardiac disease. 27,28 This may be a consequence of accelerated AV-node conduction due to factors such as increased sympathetic tone and increased heart rate during pregnancy Our findings were consistent with that.…”

Section: Discussionsupporting

confidence: 91%

Electrocardiographic proarrhythmic changes in pregnancy of women with CHD

Weismann,

Wedlund,

Ryd

et al. 2024

Cardiol Young

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Objectives: Pregnancy-related physiological adaptations result in increased heart rate as well as electrocardiographic changes such as a mean QTc prolongation of 27 ms. Pregnant women with CHD are at increased risk for cardiovascular complications. The aim of this study was to identify risk factors for abnormally prolonged QTc interval—a risk factor for ventricular arrhythmias—in pregnant women with CHD. Material and method: Retrospective longitudinal single-centre study. Pre-pregnancy demographic and electrocardiographic risk factors for abnormal QTc duration during pregnancy of (a) > 460 ms and (b) >27 ms increase were analyzed. Results: Eighty-three pregnancies in 63 women were included, of which three had documented arrhythmias. All five Modified World Health Organization Classification of Maternal Cardiovascular Risk (mWHO) classes were represented, with 15 pregnancies (18.1%) in mWHO class I, 26 (31.3%) in mWHO II, 28 (33.7%) in mWHO II-III, 11 (13.3%) in mWHO III, and three pregnancies (3.6%) in mWHO class IV. Heart rate and QTc interval increased, while QRS duration and PR interval shortened during pregnancy. QTc duration of > 460 ms was associated with increased pre-pregnancy QTc interval, QRS duration, and weight, as well as body mass index. QTc increase of > 27 ms was associated with increased heart rate prior to pregnancy. No significant associations of electrocardiographic changes with mWHO class or CHD type were identified. Conclusion: Increased QTc in pregnant women with CHD was associated with being overweight or having higher heart rate, QRS, or QTc duration prior to pregnancy. These patients should be monitored closely for arrhythmias during pregnancy.

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