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https://www.readbyqxmd.com/read/28108014/electrocardiographic-spatial-loops-indicate-organization-of-atrial-fibrillation-minutes-before-ablation-related-transitions-to-atrial-tachycardia
#1
Tina Baykaner, Rishi Trikha, Junaid A B Zaman, David E Krummen, Paul J Wang, Sanjiv M Narayan
BACKGROUND: During ablation for atrial fibrillation (AF), it is challenging to anticipate transitions to organized tachycardia (AT). Defining indices of this transition may help to understand fibrillatory conduction and help track therapy. OBJECTIVE: To determine the timescale over which atrial fibrillation (AF) organizes en route to atrial tachycardia (AT) using the ECG referenced to intracardiac electrograms. METHODS: In 17 AF patients at ablation (58...
January 15, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28107340/association-of-diabetes-related-complications-with-heart-rate-variability-among-a-diabetic-population-in-the-uae
#2
Ahsan H Khandoker, Haitham M Al-Angari, Kinda Khalaf, Sungmun Lee, Wael Almahmeed, Habiba S Al Safar, Herbert F Jelinek
Microvascular, macrovascular and neurological complications are the key causes of morbidity and mortality among type II diabetes mellitus (T2DM) patients. The aim of this study was to investigate the alterations of cardiac autonomic function of diabetic patients in relation to three types of diabetes-related complications. ECG recordings were collected and analyzed from 169 T2DM patients in supine position who were diagnosed with nephropathy (n = 55), peripheral neuropathy (n = 64) and retinopathy (n = 106) at two hospitals in the UAE...
2017: PloS One
https://www.readbyqxmd.com/read/28107074/analysis-of-the-normal-electrocardiogram-in-wild-rooks-corvus-frugilegus
#3
Hossein Hassanpour, Hossein Abbasi Dehkordi, Mehdi Khosravi, Saeid Soltani, Leila Nasiri
To describe the normal electrocardiographic (ECG) patterns and values in unanesthetized rooks ( Corvus frugilegus ), standard bipolar (I, II, and III) and augmented unipolar limb (aVR, aVL, and aVF) lead ECGs were recorded from 10 clinically healthy wild rooks. Wave forms were analyzed in all leads at 50 mm/s and at 10 mm = 1 mV to determine PR, QRS, ST, and QT durations; the net QRS complex; and P and T amplitudes. The polarity of each waveform was tabulated in all leads. The mean electrical axis (MEA) for the frontal plane was counted by using leads II and III...
December 2016: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28104706/selecting-patients-with-non-st-elevation-acute-coronary-syndrome-for-coronary-angiography-a-nationwide-clinical-vignette-study-in-the-netherlands
#4
Josien Engel, Judith M Poldervaart, Ineke van der Wulp, Johannes B Reitsma, Martine C de Bruijne, Jeroen J H Bunge, Maarten J Cramer, Wouter J Tietge, Ruben Uijlings, Cordula Wagner
OBJECTIVE: Cardiac guidelines recommend that the decision to perform coronary angiography (CA) in patients with Non-ST-Elevation Acute Coronary Syndrome (NST-ACS) is based on multiple factors. It is, however, unknown how cardiologists weigh these factors in their decision-making. The aim was to investigate the importance of different clinical characteristics, including information derived from risk scores, in the decision-making of Dutch cardiologists regarding performing CA in patients with suspected NST-ACS...
January 19, 2017: BMJ Open
https://www.readbyqxmd.com/read/28101960/effects-of-antegrade-accessory-pathway-conduction-on-qrs-terminal-vector-in-patients-with-pre-excitation-syndrome
#5
Renguang Liu, Q I Chen, Yang Chen, Yingjie Zhang, Zhaolong Xu, Gaopin Wang
BACKGROUND: Ventricle pre-excitation through accessory pathway changes QRS initial vector, and manifests as delta wave on ECG. However, QRS terminal vector can also be affected. METHODS: 158 patients who had single accessory pathway (AP) with antegrade conduction capacity were included and divided into 2 groups according to the ECG with or without delta wave. In 150 patients had delta wave (overt AP group) on ECG, classical pre-excitation syndrome was diagnosed before radiofrequency ablation (RFCA)...
January 19, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28099163/adapting-smartphone-based-photoplethysmograpy-to-suboptimal-scenarios
#6
Augusto Garcia-Agundez, Tim Dutz, Stefan Goebel
Photoplethysmography (PPG) is an optical technique used to measure the heart rate (HR) and other cardiovascular variables by analyzing volume changes in the microvascular bed of tissue. At the moment, smartphone users can already measure their HR using PPG applications that use the smartphone's built-in camera. However, available applications are unreliable when artifacts are present, such as those caused by movement, finger pressure, or ambient light changes. This contribution aims to analyze the limitations of a smartphone-based PPG algorithm capable of measuring N-N intervals when such artifacts are present by comparing it to a 2-lead electrocardiography (ECG)...
January 18, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28097316/evaluation-of-structural-progression-in-arrhythmogenic-right-ventricular-dysplasia-cardiomyopathy
#7
Thomas P Mast, Cynthia A James, Hugh Calkins, Arco J Teske, Crystal Tichnell, Brittney Murray, Peter Loh, Stuart D Russell, Birgitta K Velthuis, Daniel P Judge, Dennis Dooijes, Ryan J Tedford, Jeroen F van der Heijden, Harikrishna Tandri, Richard N Hauer, Theodore P Abraham, Pieter A Doevendans, Anneline S J M Te Riele, Maarten J Cramer
Importance: Considerable research has described the arrhythmic course of arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C). However, objective data characterizing structural progression, such as ventricular enlargement and cardiac dysfunction, in ARVD/C are relatively scarce. Objectives: To define the extent of structural progression, identify determinants of structural progression, and determine the association between structural progression and electrocardiographic (ECG) changes in patients with ARVD/C...
January 11, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28096836/coronary-artery-spasm-following-on-pump-coronary-artery-bypass-grafting-with-20-months-follow-up
#8
Adam R Kowalówka, Marcin Malinowski, Magdalena Onyszczuk, Marek Deja
We report on a 69-year-old woman who demonstrated native coronary artery and grafted vessel spasm following on-pump coronary artery bypass grafting (CABG). Despite intraaortic balloon pump (IABP) insertion, electrocardiogram (ECG) abnormalities did not disappear. Emergency coronary angiography (CAG) was performed. The patient was successfully treated with systemic and intracoronary injection of vasodilator agents. ECG changes disappeared, with normalized and stable hemodynamic function. Intraaortic balloon pump was maintained for 48 h...
December 2016: Kardiochirurgia i Torakochirurgia Polska, Polish Journal of Cardio-Thoracic Surgery
https://www.readbyqxmd.com/read/28096758/effects-of-acute-ingestion-of-a-pre-workout-dietary-supplement-with-and-without-p-synephrine-on-resting-energy-expenditure-cognitive-function-and-exercise-performance
#9
Y Peter Jung, Conrad P Earnest, Majid Koozehchian, Elfego Galvan, Ryan Dalton, Dillon Walker, Christopher Rasmussen, Peter S Murano, Mike Greenwood, Richard B Kreider
BACKGROUND: The purpose of this study was to examine the effects of acute ingestion of a pre-workout dietary supplement (PWS) with and without p-synephrine (S) on perceptions of readiness to perform, cognitive function, exercise performance, and markers of safety. METHODS: In a randomized, double-blind, and counterbalanced manner; 25 healthy and recreationally active male and female participants ingested a flavored maltodextrin placebo (PLA), a PWS containing beta-alanine (3 g), creatine nitrate as a salt (2 g), arginine alpha-ketoglutarate (2 g), N-Acetyl-L-Tyrosine (300 mg), caffeine (284 mg), Mucuna pruiriens extract standardized for 15% L-Dopa (15 mg), Vitamin C as Ascorbic Acid (500 mg), niacin (60 mg), folate as folic acid (50 mg), and Vitamin B12 as Methylcobalamin (70 mg) with 2 g of maltodextrin and flavoring; or, the PWS with Citrus aurantium (PWS + S) extract standardized for 30% p-synephrine (20 mg)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28091836/assessment-of-edema-using-stir-via-3d-cardiovascular-magnetic-resonance-imaging-in-patients-with-suspected-myocarditis
#10
Michael Jeserich, Bela Merkely, Pascal Schlosser, Simone Kimmel, Gabor Pavlik, Stephan Achenbach
OBJECTIVE: To evaluate three-dimensional T2-weighted fast spin echo triple inversion recovery sequences (STIR+) for the diagnosis of myocardial edema in patients with suspected early myocarditis after respiratory or gastrointestinal tract viral infection and at follow-up. MATERIALS AND METHODS: We prospectively examined 28 patients with suspected myocarditis and 37 controls matched for gender and age. An ECG-triggered STIR+ was used to cover the entire left ventricle in short-axis images with 10-mm slice thickness and no interslice gap...
January 16, 2017: Magma
https://www.readbyqxmd.com/read/28089241/dynamic-t-wave-inversions-in-the-setting-of-left-bundle-branch-block
#11
H Pendell Meyers, Stephen W Smith
We illustrate the case a patient with left bundle branch block (LBBB) and electrocardiogram (ECG) changes consistent with those described in Wellens' syndrome. The characteristic ECG findings of Wellens' syndrome identify patients who have a particularly high rate of important coronary events in the near future, however these findings have previously been described only in the setting of normal conduction. A review of Wellens' syndrome, its criteria and pathophysiology, and its proposed appearance in the setting of LBBB is presented...
December 24, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28087358/vascular-calcification-abrogates-the-nicorandil-mediated-cardio-protection-in-ischemia-reperfusion-injury-of-rat-heart
#12
Sriram Ravindran, Jeyashri Murali, Sunil Kumar Amirthalingam, Senthilkumar Gopalakrishnan, Gino A Kurian
The present study was aimed to determine the efficacy of nicorandil in treating cardiac reperfusion injury with an underlying co-morbidity of vascular calcification (VC). Adenine diet was used to induce VC in Wistar rat and the heart was isolated to induce global ischemia reperfusion (IR) by Langendorff method, with and without the nicorandil (7.5mg/kg) pre-treatment and compared with those fed on normal diet. The adenine-treated rats displayed abnormal ECG changes and altered mitochondrial integrity compared to a normal rat heart...
January 10, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28080081/the-heart-of-parenting-parent-hr-dynamics-and-negative-parenting-while-resolving-conflict-with-child
#13
Xutong Zhang, Lixian Cui, Zhuo Rachel Han, Jia Yan
The current study examined parent heart rate (HR) dynamic changing patterns and their links to observed negative parenting (i.e., emotional unavailability and psychological control) during a parent-child conflict resolution task among 150 parent-child dyads (child age ranged from 6 to 12 years, Mage = 8.54 ± 1.67). Parent HR was obtained from electrocardiogram (ECG) data collected during the parent-child conflict resolution task. Negative parenting was coded offline based on the video recording of the same task...
January 12, 2017: Journal of Family Psychology: JFP
https://www.readbyqxmd.com/read/28078546/postoperative-real-time-electrocardiography-monitoring-detects-myocardial-ischemia-a-case-report
#14
Homer Yang, Ashraf Fayad, Alan Chaput, Stuart Oake, Adrian D C Chan, Mary Lou Crossan
PURPOSE: This case report outlines the utility and challenges of remote continuous postoperative electrocardiography ECG) monitoring, which is routed through a secure smartphone to provide real-time detection and management of myocardial ischemia. CLINICAL FEATURES: A 42-yr-old male with previous myocardial infarction and angioplasty underwent a radical prostatectomy. At three hours and 45 min postoperatively, remote real-time ECG monitoring was initiated upon the patient's arrival on a regular surgical ward...
January 11, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28078246/the-effects-of-crocin-insulin-and-their-co-administration-on-the-heart-function-and-pathology-in-streptozotocin-induced-diabetic-rats
#15
Amir Abbas Farshid, Esmaeal Tamaddonfard, Masoumeh Moradi-Arzeloo, Navideh Mirzakhani
OBJECTIVE: Crocin is a saffron constituent with a potent anti-oxidant activity. The present study investigated the effects of crocin and insulin treatments (alone or in combination) on cardiac function and pathology in diabetic rats. MATERIALS AND METHODS: Diabetes was induced by intraperitoneal (i.p.) injection of streptozotocin (STZ, 50 mg/kg). Thereafter, crocin (5, 10 and 20 mg/kg, i.p.), subcutaneous (s.c.) injection of insulin (4 IU/kg) and their combination were administered for eight weeks...
November 2016: Avicenna Journal of Phytomedicine
https://www.readbyqxmd.com/read/28078208/influence-of-different-second-generation-antipsychotics-on-the-qtc-interval-a-pragmatic-study
#16
Roy E Olsen, Rune A Kroken, Sigmund Bjørhovde, Kristina Aanesen, Hugo A Jørgensen, Else-Marie Løberg, Erik Johnsen
AIM: To investigate whether differential influence on the QTc interval exists among four second generation antipsychotics (SGAs) in psychosis. METHODS: Data were drawn from a pragmatic, randomized head-to-head trial of the SGAs risperidone, olanzapine, quetiapine, and ziprasidone in acute admissions patients with psychosis, and with follow-up visits at discharge or maximally 6-9 wk, 3, 6, 12 and 24 mo. Electrocardiograms were recorded on all visits. To mimic clinical shared decision-making, the patients were randomized not to a single drug, but to a sequence of the SGAs under investigation...
December 22, 2016: World Journal of Psychiatry
https://www.readbyqxmd.com/read/28077814/life-threatening-ventricular-arrhythmia-and-brugada-type-st-segment-elevation-associated-with-acute-ischemia-of-the-right-ventricular-outflow-tract
#17
Rena Nakamura, Mitsuhiro Nishizaki, Kiko Lee, Masato Shimizu, Hiroyuki Fujii, Noriyoshi Yamawake, Harumizu Sakurada, Masayasu Hiraoka, Mitsuaki Isobe
BACKGROUND: Brugada-type ECG (Br-ECG) is occasionally observed during acute myocardial ischemia of the right ventricular outflow tract (RVOT). No studies have explored, however, the association of ventricular tachyarrhythmia and development of Br-ECG due to acute ischemia of the RVOT.Methods and Results:The study included 13 consecutive patients with acute ischemia of the RVOT during coronary catheterization. Patients were divided into 2 groups: those with Br-ECG (group B) and those without (group N)...
January 11, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28074788/comparison-of-two-doses-of-heparin-on-outcome-in-off-pump-coronary-artery-bypass-surgery-patients-a-prospective-randomized-control-study
#18
Murali Chakravarthy, Dattatreya Prabhakumar, Patil Thimmannagowda, Jayaprakash Krishnamoorthy, Antony George, Vivek Jawali
INTRODUCTION: While off pump coronary artery bypass surgery is practiced with an intention to reduce the morbidity associated with cardiopulmonary bypass, the resultant 'hypercoagulability' needs to be addressed. Complications such as cavitary thrombus possibly due to the hyper coagulability after off pump coronary artery bypass surgery have been described. Many clinicians use higher doses of heparin - up to 5 mg/kg in order to thwart this fear. Overall, there appears to be no consensus on the dose of heparin in off pump coronary artery bypass surgeries...
January 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28072871/atrophic-and-metaplastic-progression-in-the-background-mucosa-of-patients-with-gastric-adenoma
#19
Hee Kyong Na, Charles J Cho, Suh Eun Bae, Jeong Hoon Lee, Young Soo Park, Ji Yong Ahn, Do Hoon Kim, Kee Don Choi, Ho June Song, Gin Hyug Lee, Se Jin Jang, Hwoon-Yong Jung
BACKGROUND: In patients with adenoma, assessing premalignant changes in the surrounding mucosa is important for surveillance. This study evaluated atrophic and metaplastic progression in the background mucosa of adenoma or early gastric cancer (EGC) cases. METHODS: Among 146 consecutive patients who underwent endoscopic resection for intestinal-type gastric neoplasia, the adenoma group included 56 patients with low-grade dysplasia and the ECG group included 90 patients with high-grade dysplasia or invasive carcinoma...
2017: PloS One
https://www.readbyqxmd.com/read/28067212/estimation-of-the-qt-rr-relation-trade-off-between-goodness-of-fit-and-extrapolation-accuracy
#20
Alain Vinet, Bruno Dubé, Réginald Nadeau, Omar Mahiddine, Vincent Jacquemet
Correction of the QT interval in the ECG for changes in heart rate (RR interval) is needed to compare groups of patients and assess the risk of sudden cardiac death. The QTc represents the QT interval at 60 bpm, although most patients typically have a faster heart rate, thus requiring extrapolation of the QT-RR relationship. This paper investigates the ability of QT-RR models with increasing number of parameters to fit beat-to-beat variations in the QT interval and provide a reliable estimate of the QTc. One-, two- and three-parameter functions generalising the Bazett and Fridericia formulas were used in combination with hysteresis reduction (memory) obtained by time-averaging the history of RR intervals with exponentially-decaying weights...
January 9, 2017: Physiological Measurement
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