scholarly journals Comparison of heart rate obtained from shorter duration Holter recordings to 24-hour mean heart rate in dogs with atrial fibrillation

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241620
Author(s):  
Tamilselvam Gunasekaran ◽  
Bari Olivier ◽  
Lucas Griffith ◽  
Robert Sanders
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Holter Recordings ◽  
Mean Heart Rate

scholarly journals Association of Heart Rate Variability With Silent Brain Infarcts in Patients With Atrial Fibrillation

2021 ◽  
Vol 8 ◽  
Author(s):  
Peter Hämmerle ◽  
Christian Eick ◽  
Sven Poli ◽  
Steffen Blum ◽  
Vincent Schlageter ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Autonomic Dysfunction ◽  
Brain Mri ◽  
Low Frequency ◽  
Total Power ◽  
Brain Infarcts ◽  
Clinical Covariates ◽  
Prior Stroke ◽  
Mean Heart Rate

Purpose: Silent brain infarcts (SBI) are frequently detected in patients with atrial fibrillation (AF), but it is unknown whether SBI are linked to autonomic dysfunction. We aimed to explore the association of autonomic dysfunction with SBI in AF patients.Methods: 1,358 AF patients without prior stroke or TIA underwent brain MRI and 5-min resting ECG. We divided our cohort into AF patients who presented in sinus rhythm (SR-group, n = 816) or AF (AF-group, n = 542). HRV triangular index (HRVI), standard deviation of normal-to-normal intervals, mean heart rate, root mean square root of successive differences of normal-to-normal intervals, 5-min total power and power in the low frequency, high frequency and very low frequency range were calculated. Primary outcome was presence of SBI in the SR group, defined as large non-cortical or cortical infarcts. Secondary outcomes were SBI volumes and topography.Results: Mean age was 72 ± 9 years, 27% were female. SBI were detected in 10.5% of the SR group and in 19.9% of the AF group (p < 0.001). HRVI <15 was the only HRV parameter associated with the presence of SBI after adjustment for clinical covariates in the SR group [odds ratio (OR) 1.67; 95% confidence interval (CI): 1.03–2.70; p = 0.037]. HRVI <15 was associated with larger brain infarct volumes [β (95% CI) −0.47 (−0.84; −0.09), p = 0.016] in the SR group and was more frequently observed in patients with right- than left-hemispheric SBI (p = 0.017).Conclusion: Impaired HRVI is associated with SBI in AF patients. AF patients with autonomic dysfunction might undergo systematic brain MRI screening to initiate intensified medical treatment.Clinical Trials Gov Identifier: NCT02105844.

scholarly journals External validity of a model to predict postoperative atrial fibrillation after thoracic surgery

2019 ◽  
Vol 57 (5) ◽  
pp. 874-880 ◽  
Author(s):  
Heather Smith ◽  
Heidi Li ◽  
Olivier Brandts-Longtin ◽  
Ching Yeung ◽  
Donna Maziak ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Thoracic Surgery ◽  
Risk Score ◽  
External Validation ◽  
Postoperative Atrial Fibrillation ◽  
Risk Scores ◽  
Incidence Risk ◽  
Lung Resections ◽  
Mean Heart Rate

Abstract OBJECTIVES A prediction model developed by Passman et al. stratifies patients’ risk of postoperative atrial fibrillation (POAF) after major non-cardiac thoracic surgery using 3 simple factors (sex, age and preoperative resting heart rate). The model has neither undergone external validation nor proven to be relevant in current thoracic surgery practice. METHODS A retrospective single-centre analysis of all patients who underwent major non-cardiac thoracic surgery (2008–2017) with prospective documentation of incidence and severity of POAF was used for external validation of Passman’s derivation sample (published in 2005 with 856 patients). The model calibration was assessed by evaluating the incidence of POAF and patients’ risk scores (0–6). RESULTS A total of 2054 patients were included. Among them, POAF occurred in 164 (7.9%), compared to 147 (17.2%) in Passman’s study. Differences in our sample compared to Passman’s sample included mean heart rate (75.7 vs 73.7 bpm, P < 0.001), proportion of patients with hypertension (46.1 vs 29.4%, P < 0.001), proportion of extensive lung resections, particularly pneumonectomy (6.1 vs 21%, P < 0.001) and proportion of minimally invasive surgeries (56.6% vs 0%). The model demonstrated a positive correlation between risk scores and POAF incidence (risk score 1.2% vs 6.16%). CONCLUSIONS The POAF model demonstrated good calibration in our population, despite a lower overall incidence of POAF compared to the derivation study. POAF rates were higher among patients with a higher risk score and undergoing procedures with greater intrathoracic dissection. This tool may be useful in identifying patients who are at risk of POAF when undergoing major thoracic surgery and may, therefore, benefit from targeted prophylactic therapy.

Atrial Overdrive Pacing for Conversion of Atrial Flutter in Children

PEDIATRICS ◽  
1985 ◽  
Vol 75 (4) ◽  
pp. 730-736
Author(s):  
Robert M. Campbell ◽  
Macdonald Dick ◽  
Janice M. Jenkins ◽  
Robert L. Spicer ◽  
Dennis C. Crowley ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Atrial Flutter ◽  
Direct Current ◽  
Cycle Length ◽  
Right Atrial ◽  
Atrial Pacing ◽  
Direct Current Cardioversion ◽  
Overdrive Pacing ◽  
Mean Heart Rate

Twenty-three successive patients with 27 different episodes of sustained atrial flutter were treated with atrial pacing for conversion of the tachyarrhythmia; 15 patients with 16 episodes of atrial flutter underwent intracardiac right atrial pacing and eight patients with 11 episodes of atrial flutter were treated with transesophageal atrial pacing. Ten of sixteen episodes (63%) and eight of 11 episodes (73%) were successfully converted using intracardiac and transesophageal techniques, respectively. Mean flutter cycle length for all 27 episodes was 219 ms (mean heart rate 274 beats per minute); successful pacing conversion cycle length (n = 15) was 72% of the flutter cycle length. Hemodynamic, electrophysiologic, and roentgenographic data were not predictive of conversion by either technique. Induction of localized atrial fibrillation or failure to meet critical pacing criteria may explain pacing failures. Based on this experience, a trial of transesophageal atrial pacing for acute conversion of any episode of atrial flutter in children prior to direct current cardioversion is recommended.

P1454A telemonitoring service approved by the ministry of health for a large-scale screening of silent and symptomatic atrial fibrillation

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
L Lupi ◽  
F Glisenti ◽  
I Papa ◽  
M Piazzani ◽  
G Arabia ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Anticoagulant Therapy ◽  
Positive Impact ◽  
Holter Monitoring ◽  
Ventricular Rate ◽  
High Risk Population ◽  
Care Services ◽  
History Of ◽  
Mean Heart Rate

Abstract Introduction despite good progress in the management of patients with atrial fibrillation (AF), this disease remains one of the major cause of stroke, heart failure, sudden death and cardiovascular morbidity. Screening for silent AF is recommended in high risk population, especially in elderly, but often it is not applied for the absence of medical prescriptions or long waiting times Purpose to evaluate the effectiveness of a remote monitoring through ECG Holter and 12-lead ECG provided by a network of pharmacies across the Country for the screening of AF Methods according to a Ministerial Decree, from 2010 authorized pharmacies may provide specialist outpatient care services. Health Telematic Network, in collaboration with our Cardiology University Department and Federfarma (National Association of Pharmacists), has installed in 4,008 authorized pharmacies across the Country a telematic network connected to a single Telemedicine platform where cardiologists were available for tele-consulting. In order to identify silent or symptomatic AF, 12-lead ECG and ECG Holter monitoring were performed in patients with episodes of palpitation, syncope or pre-syncope or with a history of AF. Informations regarding lenght of AF episodes, mean heart rate and anticoagulant therapy were collected Results From Jan 2017 to Dec 2018 a total of 31,156 ECG Holter monitoring were performed (46% male, mean age 61 years). Among these records, 2390 (8%) showed paroxysmal or persistent AF (53% male, mean age 77±10 years). The lenght of AF episodes was greater of 6 minutes in 14% cases and mean heart rate was greater of 90 bpm in 406 patients (17%). History of AF was not previously known in 669 patients (28%). None of this subgroup of patients and only 18% of patients with known paroxysmal AF were taking anticoagulant therapy. In the same period 196,349 ECG were performed (mean age 78 years) and 17,088 have been carried out in patients aged 65 years or older. Among these group of patients, 831 records showed unknown AF (5%): 356 (43%) high ventricular rate AF, 385 (46%) medium ventricular rate AF and 90 (11%) low ventricular rate AF. All the patients with unknown AF episodes or with frequent high ventricular rate AF episodes were referred to their General Practitioner or Cardiologist for urgent evaluation and therapeutic management. Conclusion our data confirm the important role of a single telematic network in which health care services can be provided timely by authorized pharmacies across all the Country to promote early diagnosis and treatment of AF, then resulting in a likely positive impact on related cardiovascular events

Heart rate in atrial fibrillation can be regulated by neurostimulation: results of an experimental study

2006 ◽  
Vol 54 (S 1) ◽  
Author(s):  
M Schmid ◽  
S Christiansen ◽  
G Langebartels ◽  
K Mischke ◽  
M Zarse ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Experimental Study

Effect of amiodarone on heart rate variability in patients with newly diagnosed atrial fibrillation (clinical observation)

2020 ◽  
pp. 81-85
Author(s):  
E. P. Popova ◽  
O. T. Bogova ◽  
S. N. Puzin ◽  
D. A. Sychyov ◽  
V. P. Fisenko
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Drug Therapy ◽  
Heart Function ◽  
Newly Diagnosed ◽  
Class Iii ◽  
Spectral Parameters ◽  
Patient Will ◽  
The Individual

Spectral analysis of heart rate variability gives an idea of the role of the autonomic nervous system in the regulation of chronotropic heart function. This method can be used to evaluate the effectiveness of drug therapy. Drug therapy should be carried out taking into account the individual clinical form of atrial fibrillation. Information about the vegetative status of the patient will undoubtedly increase the effectiveness of treatment. In this study, spectral parameters were studied in patients with newly diagnosed atrial fibrillation. The effect of antiarrhythmic drug class III amiodarone on the spectral parameters of heart rate variability was studied.

HEART COMPLICATIONS IN HYPERTHYROIDISM

2011 ◽  
pp. 7-17
Author(s):  
Hai Thuy Nguyen ◽  
Anh Vu Nguyen
Keyword(s):  
Atrial Fibrillation ◽  
Blood Pressure ◽  
Heart Rate ◽  
Heart Diseases ◽  
Systolic Dysfunction ◽  
Oxygen Demand ◽  
Left Ventricular ◽  
Cardiac Contraction ◽  
Cardiac Complications ◽  
Cardiac Symptoms

Thyroid hormone increases the force of the contraction and the amount of the heart muscle oxygen demand. It also increases the heart rate. Due to these reasons, the work of the heart is greatly increased in hyperthyroidism. Hyperthyroidism increases the amount of nitric oxide in the intima, lead them to be dilated and become less stiff. Cardiac symptoms can be seen in anybody with hyperthyroidism, but can be particularly dangerous in whom have underlying heart diseases. Common symptoms include: tachycardia and palpitations. Occult hyperthyroidism is a common cause of an increased heart rate at rest and with mild exertion. Hyperthyroidism can also produce a host of other arrhythmias such as PVCs, ventricular tachycardia and especially atrial fibrillation. Left ventricular diastolic dysfunction and systolic dysfunction, Mitral regurgitation and mitral valve prolapsed are heart complications of hyperthyroism could be detected by echocardiography. The forceful cardiac contraction increases the systolic blood pressure despite the increased relaxation in the blood vessels reduces the diastolic blood pressure. Atrial fibrillation, atrial enlargement and congestive heart failure are important cardiac complications of hyperthyroidism. An increased risks of stroke is common in patients with atrial fibrillation. Graves disease is linked to autoimmune complications, such as cardiac valve involvement, pulmonary arterial hypertension and specific cardiomyopathy. Worsening angina: Patients with coronary artery disease often experience a marked worsening in symptoms with hyperthyroidism. These can include an increase in chest pain (angina) or even a heart attack.

Circadian blood pressure and heart rate rhythms in mice

1999 ◽  
Vol 276 (2) ◽  
pp. R500-R504 ◽  
Author(s):  
Ping Li ◽  
Steven H. Sur ◽  
Ralph E. Mistlberger ◽  
Mariana Morris
Keyword(s):  
Heart Rate ◽  
Sampling Rate ◽  
Eating Patterns ◽  
Cardiovascular Parameters ◽  
C57bl Mice ◽  
Weight Analysis ◽  
Using Data ◽  
Computerized Monitoring ◽  
Carotid Arterial ◽  
Mean Heart Rate

The circadian pattern of mean arterial pressure (MAP) and heart rate (HR) was measured in C57BL mice with carotid arterial catheters. Cardiovascular parameters were recorded continuously with a computerized monitoring system at a sampling rate of 100 Hz. The tethered animals were healthy, showing stabilized drinking and eating patterns within 2 days of surgery and little loss of body weight. Analysis of the 24-h pattern of MAP and HR was conducted using data from 3–6 consecutive days of recording. A daily rhythm of MAP was evident in all mice, with group mean dark and light values of 101.4 ± 7.3 and 93.1 ± 2.9 mmHg, respectively. The group mean waveform was bimodal, with peak values evident early and late in the dark period, and a trough during the middle of the light period. The phase of maximum and minimum values showed low within-group variance. Mean heart rate was greater at night than during the day (561.9 ± 22.7 vs. 530.3 ± 22.3 beats/min). Peak values generally occurred at dark onset, and minimum values during the middle of both the dark and the light periods. We conclude that it is possible to perform measurements of circadian cardiovascular parameters in the mouse, providing new avenues for the investigation of genetic models.

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