scholarly journals Weighing In The Evidence: Lifestyle Modification In The Treatment Of Atrial Fibrillation

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Kathryn Hong
Keyword(s):  
Lifestyle Modification ◽  
Pulmonary Veins ◽  
Heart Rhythm ◽  
Fold Increase ◽  
Normal Heart ◽  
Electrical Transmission ◽  
Sa Node ◽  
Normal Heart Rate ◽  
Canadian Population ◽  
Electrical Impulses

Imagine if you suddenly felt your heart “jumping out of your chest” – this is the case for an estimated 1 in 4 Canadians who experience this rapid and chaotic heartbeat characteristic of atrial brillation (AF). The healthy heart works continuously to beat regularly under the control of electrical impulses originating from the sinoatrial (SA) node, the heart’s natural pacemaker. In AF, electrical impulses do not originate in the SA node, but rather, from a different part of the atrium or in nearby pulmonary veins. These abnormal electrical signals become rapid and disorganized, radiating throughout the atrial walls in an uncoordinated manner. This can cause the walls of the atrium to quiver, or brillate, which results in irregular electrical transmission from the atria to the ventricles. A normal heart rate at rest should be between 60-100 beats per minute at rest, but in AF, it can be considerably higher than 140 beats per minute1. Affecting more than 33 million individuals worldwide, AF is the most common sustained irregular heart rhythm encountered in clinical practice2. The progression and maintenance of AF results in adverse events, including an increase in hospitalizations and a ve-fold increase in the risk of stroke3. Given this evidence and anticipated increases in life expectancy within the next several decades, there are clear public health implications for the aging Canadian population.

DIURNAL FTRRINOLYTIC RHYTHM IN PATIENTS WITH FIXED HEART RATE

1987 ◽  
Author(s):  
P Peternel ◽  
H Možina ◽  
S Pušnar ◽  
D Keber ◽  
M Stegnar ◽  
...  
Keyword(s):  
Heart Rate ◽  
Diurnal Rhythm ◽  
Fibrinolytic Activity ◽  
Venous Blood ◽  
Fold Increase ◽  
Minute Volume ◽  
Diurnal Fluctuation ◽  
Clot Lysis ◽  
Normal Heart ◽  
Normal Heart Rate

It has been established that fibrinolytic activity fluctuates during the day. Diurnal rhythm is possibly related to hemodynamic changes caused by daily activities. This presumption was tested in 10 patients with pacemaker and therefore fixed heart rate and limited changes in heart minute volume. Ten age and sex matched volunteers with normal heart rate served as controls. Venous blood was sampled at 8 a.m., noon, 4 p.m., 8 p.m., midnight and 4 a.m. Fibrinolytic activity was measured by three methods: spectrophotometric assay for tissue plasminogen activator (t-PA) activity, with euglobulin clot lysis time (ECLT) and on fibrin plates (FP). In patients with fixed heart rate no significant diurnal fluctuation in fibrinolytic activity was observed. In subjects with normal heart rate, diurnal rhythm was confirmed by all three methods. The highest fluctuation in activity was observed by t-PA assay with peak activity at noon (80 fold increase compared to midnight value). Also FP showed the highest activity at noon.With ECLT highest activity was detected at 4 p.m.Absence of diurnal rhythm in patients with fixed heart rate suggested importance of heart minute volume in regulation of blood fibrinolytic activity.

Evaluation of Normal Heart Rate in Early Pregnancy Corresponding to Gestational Age between Six to Eight Weeks

Med Phoenix ◽  
2017 ◽  
Vol 2 (1) ◽  
pp. 34-37
Author(s):  
Akhilesh Kumar Jha ◽  
Bikranta Rimal ◽  
Tarannum Khatun
Keyword(s):  
Heart Rate ◽  
Early Pregnancy ◽  
Well Being ◽  
Clinical Decision ◽  
First Trimester ◽  
Normal Heart ◽  
Normal Heart Rate ◽  
First Trimester Of Pregnancy ◽  
Singleton Pregnancies

Background: Ultrasonography is the reliable and safe way for the evaluation of pregnancy. Heart rate can be detected more confidently from the Ultrasonography. Heart rate is an important parameter for the evaluation of early pregnancy. The purpose of this study was to evaluate the normal heart rate in embryos/fetuses between 6 and 8 weeks of gestation.Method: In our region people are poor and most of them do not know the benefit of regular follow up examination during pregnancy. So most of pregnant women come to our centre at late stage of pregnancy. The number of pregnancy cases is good in our centre but the number of early pregnancy cases coming to regular follow up examination is low. Thus the study was conducted in 51 normal singleton pregnancies undergoing routine ultrasound examination during the first trimester of pregnancy. The duration of study was 6 weeks.Result: Out of 51 singleton pregnancies, 20 cases (39.2%) heart rate were between 131-150 beat per minute and 25 cases (49.0 %) heart rate were between 151-170 beat per minute. However 4 cases (7.8%) were between 110-120 beat per minute and 2 cases (3.9%) were more than 171 beat per minute. There were zero cases above the 180 beat per minute.Conclusion: The result of this study will help to evaluate abnormal and normal fetal heart rate so that early clinical decision whether to continue the pregnancy or terminate it can be taken, as Ultrasonography is only the method used in screening fetal well being in most of the region of our country.Med Phoenix Vol.2(1) July 2017, 34-37

Sema3a maintains normal heart rhythm through sympathetic innervation patterning

2007 ◽  
Vol 13 (5) ◽  
pp. 604-612 ◽  
Author(s):  
Masaki Ieda ◽  
Hideaki Kanazawa ◽  
Kensuke Kimura ◽  
Fumiyuki Hattori ◽  
Yasuyo Ieda ◽  
...  
Keyword(s):  
Sympathetic Innervation ◽  
Heart Rhythm ◽  
Normal Heart

scholarly journals Temporary transvenous endocardial pacing: method of endocardial electrode reposition in the right ventricular cavity of the heart

2016 ◽  
Vol 97 (3) ◽  
pp. 453-457
Author(s):  
A N Osmolovsky
Keyword(s):  
Myocardial Infarction ◽  
Right Ventricular ◽  
Heart Rhythm ◽  
Ventricular Cavity ◽  
Cardiac Stimulation ◽  
Artificial Pacemaker ◽  
Temporary Pacing ◽  
The Right ◽  
Electrical Impulses ◽  
Endocardial Electrode

Aim. To justify and develop method of endocardial electrode reposition in the right ventricular cavity of the heart in the spontaneous termination of temporary pacing in patients with recurrent myocardial infarction.Methods. A method of endocardial electrode reposition was used in 23 patients with myocardial infarction complicated by acute bradyarrhythmias. Written informed consent was obtained from all patients, and in the absence of contact with the patient, decision to insert temporary artificial pacemaker was made by medical consultation.Results. A method of endocardial electrode reposition that provides threading the electrode from the venous bed to the right ventricular cavity of the heart, cardiac stimulation by electrical impulses and creation the new contacts between electrode and right ventricular endocardium of the heart using the same electrode, both in the presence and in absence of the heart conduction and excitation function, was developed. At the same time, it excludes the electrode dislocation from the right ventricular cavity of the heart, provides the electrode fixation with endocardium, and at the same time allows to impose a stable artificial heart rhythm in the shortest time. During the spontaneous termination of the effective artificial pacemaker, endocardial electrodes reposition enabled to promptly regain the heart rhythm control in all 23 patients with acute bradyarrhythmia of infarction genesis.Conclusion. Effective and safe method of endocardial electrode reposition in the right ventricular cavity of the heart in the spontaneous termination of temporary pacing in patients with recurrent myocardial infarction was developed and introduced into clinical practice.

scholarly journals SARS-CoV-2 infection in an infant with severe dilated cardiomyopathy

2020 ◽  
pp. 1-3
Author(s):  
Aslak Widerøe Kristoffersen ◽  
Per Kristian Knudsen ◽  
Thomas Møller
Keyword(s):  
Heart Rate ◽  
Dilated Cardiomyopathy ◽  
Fluid Balance ◽  
Cardiac Disease ◽  
Gastrointestinal Symptoms ◽  
Close Monitoring ◽  
Disease Course ◽  
Normal Heart ◽  
The Past ◽  
Normal Heart Rate

Abstract A four- and a half-month-old girl with severe dilated cardiomyopathy due to neonatal enterovirus myocarditis, treated with diuretics and milrinone for the past 4 months, was infected with SARS-CoV-2. The disease course was characterised by high fever and gastrointestinal symptoms. Cardiac function, as measured by echocardiography, remained stable. The treatment focused on maintaining a normal heart rate and a stable fluid balance. In children with severe underlying cardiac disease, even a mild SARS-CoV-2 infection can require close monitoring and compound treatment.

What is a Normal Heart Rate Prior to Surgery?

1990 ◽  
Vol 72 (6) ◽  
pp. 1102-1102 ◽  
Author(s):  
DANIEL W. WINGARD
Keyword(s):  
Heart Rate ◽  
Normal Heart ◽  
Normal Heart Rate

Factors Related to the Dive Reflex in Harbor Seals: Respiration, Immersion Bradycardia, and Lability of the Heart Rate

1974 ◽  
Vol 52 (2) ◽  
pp. 248-258 ◽  
Author(s):  
Robert W. Dykes
Keyword(s):  
Heart Rate ◽  
Individual Differences ◽  
Time Course ◽  
Breathing Pattern ◽  
Mean Amplitude ◽  
Harbor Seals ◽  
Normal Heart ◽  
Normal Heart Rate ◽  
The Mean ◽  
Mean Heart Rate

The normal heart rate of young breathing harbor seals, 130.1 beats/min (S.E.M. = 22, n = 33), decreases by 50% during periods of spontaneous apnea in air and by 69% during 2 min of forced apnea in air. Apneic bradycardia develops five times more slowly than bradycardia observed during immersion. During forced apnea the heart rate drops to 31% of the value observed during periods of breathing in 200 s while during immersion the heart rate drops to this value only after 20 s. Since the bradycardia during apnea has a slower time course, apnea alone cannot account for the bradycardia observed during immersion.In quietly resting seals, the apneustic breathing pattern consisted of periods of breathing (duration of 10–115 s) interrupted by apneic pauses (duration of 19–104 s). During the breathing periods successive breaths tended to be smaller so that at the end of a breathing period the mean amplitude of a respiratory movement was only 57% of the mean amplitude of the first inspiration. Tracheostomy altered the breathing pattern and lowered the mean heart rate during breathing to 43% of the rate observed in intact animals. Under controlled conditions immersion bradycardia was highly reproducible and showed no signs of conditioning to the experimental regime. Data from 56 immersions on three animals illustrated minor individual differences in the time course of the immersion bradycardia and provided the basis for an estimate of the average time course of immersion bradycardia in young harbor seals.

scholarly journals Time- and state-dependent analysis of autonomic control in narcolepsy: higher heart rate with normal heart rate variability independent of sleep fragmentation

2014 ◽  
Vol 24 (2) ◽  
pp. 206-214 ◽  
Author(s):  
Wisse P. van der Meijden ◽  
Rolf Fronczek ◽  
Robert H. A. M. Reijntjes ◽  
Eleonora P. M. Corssmit ◽  
Nienke R. Biermasz ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Autonomic Control ◽  
Sleep Fragmentation ◽  
Normal Heart ◽  
State Dependent ◽  
Normal Heart Rate
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