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Smart af

Olli Lahdenoja, Tero Hurnanen, Zuhair Iftikhar, Sami Nieminen, Timo Knuutila, Antti Saraste, Tuomas Kiviniemi, Tuija Vasankari, Juhani Airaksinen, Mikko Pankaala, Tero Koivisto
We present a smartphone-only solution for the detection of Atrial Fibrillation (AFib), which utilizes the builtin accelerometer and gyroscope sensors (Inertial Measurement Unit, IMU) in the detection. Depending on the patient's situation, it is possible to use the developed smartphone application either regularly or occasionally for making a measurement of the subject. The smartphone is placed on the chest of the patient who is adviced to lay down and perform a non-invasive recording, while no external sensors are needed...
April 5, 2017: IEEE Journal of Biomedical and Health Informatics
Paul Garabelli, Stavros Stavrakis, Sunny Po
The use of smartphones for arrhythmia monitoring is another leap for ECG utilization and arrhythmia detection - effectively taking the technology to any smartphone user. Smart wearable technology, while very common, is limited mostly to activity tracking and exercise motivation. Rhythm strip generating smartphone products (Kardia Mobile by AliveCor and ECG Check by Cardiac Designs) are more powerful at arrhythmia detection than wearable monitors. These products, which have been studied in a variety of situations, rely on an external device with metal sensors to create a rhythm strip, which is usually Lead I...
January 2017: Current Opinion in Cardiology
Nicole E Worden, Musab Alqasrawi, Alexander Mazur
BACKGROUND: Available atrial electrograms in implantable cardioverter defibrillators (ICDs) improve arrhythmia diagnosis, allow monitoring for atrial fibrillation, and may reduce the risk of inappropriate therapies. A recently introduced ICD system using a single-lead with floating atrial electrodes provides diagnostic capability of a dual-chamber system without placing an additional lead. Data on long-term clinical performance of this system are limited. METHODS: We retrospectively analyzed data from 35 consecutive patients implanted with Biotronik VR-T DX devices and Linox(Smart) DX leads...
December 2016: Pacing and Clinical Electrophysiology: PACE
Lars Grieten, Thijs Vandenberk, Dieter Nuyens
No abstract text is available yet for this article.
October 12, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Gudrun Dieberg, Neil A Smart, Nicola King
BACKGROUND: To reduce complications during coronary artery bypass grafting (CABG) off-pump CABG was introduced; however, results have been mixed. The aim of this work was to conduct a systematic review and meta-analysis of off-pump vs. on-pump CABG. METHODS: To identify potential studies systematic searches were carried out using various databases. The search strategy included the key concepts of "cardiopulmonary bypass" AND "coronary artery bypass grafting" AND "off pump"...
November 15, 2016: International Journal of Cardiology
Raphael Rosso, Ehud Chorin, Yuval Levi, Ori Rogowski, Sami Viskin
INTRODUCTION: Pulmonary vein isolation (PVI) with radiofrequency (RF) ablation is now standard care for atrial fibrillation (AF). New improvements in PVI techniques include use of catheters that measure contact-force and circular ablation catheters. These techniques have not been compared. METHODS AND RESULTS: We compared the success rate of circumferential pulmonary vein isolation (CPVI) with: (1) "point by point" RF using an irrigated tip ablation catheter with "smart touch" contact-force; (2) irrigated nMARQ circular ablation catheter in 86 patients with AF...
July 29, 2016: Journal of Cardiovascular Electrophysiology
Lian Krivoshei, Stefan Weber, Thilo Burkard, Anna Maseli, Noe Brasier, Michael Kühne, David Conen, Thomas Huebner, Andrea Seeck, Jens Eckstein
Aims: Atrial fibrillation (AF) is the most common arrhythmia encountered in clinical practice, and its paroxysmal nature makes its detection challenging. In this trial, we evaluated a novel App for its accuracy to differentiate between patients in AF and patients in sinus rhythm (SR) using the plethysmographic sensor of an iPhone 4S and the integrated LED only. Methods and results: For signal acquisition, we used an iPhone 4S, positioned with the camera lens and LED light on the index fingertip...
May 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
John E Madias
The ubiquitous smart phone/device technology (SPT) has enabled the safe acquisition/transmission (A/T) of clinical and laboratory patient data, including the electrocardiogram (ECG). SPT-based A/T of the ECG has been found useful in the detection of atrial fibrillation, in monitoring of the QTc interval, in patients undergoing antiarrhythmic drug loading, and in management of patients with acute ST-elevation myocardial infarction. Previous work has shown a relationship between changes in the voltage of the ECG QRS complexes, with perturbations in the edematous state of various etiologies, including heart failure (HF)...
September 2016: Journal of Electrocardiology
Jean Amiral, Claire Dunois, Cédric Amiral, Jerard Seghatchian
Use of Direct Oral Anticoagulants (DOACs) is continuously increasing for clinical application. The first product released was Dabigatran, which was proposed for many preventive and curative applications, especially for prevention of stroke in patients with non-valvular atrial fibrillation. Although measurement of Dabigatran Anti-IIa activity in plasma is not requested on a routine basis, in some situations its measurement is clinically useful. Especially, before an emergency surgery in treated patients, where its presence at high concentrations, which will expose the patient at an increased bleeding risk, has to be excluded...
June 2016: Transfusion and Apheresis Science
Ibrahim Marai, Mahmoud Suleiman, Miry Blich, Jonathan Lessick, Sobhi Abadi, Monther Boulos
AIM: To investigate the impact of using computed tomography (CT) and contact force (CF) technology on recurrence of atrial tachyarrhythmia after atrial fibrillation (AF) ablation. METHODS: This non-randomized study included 2 groups of patients. All patients had symptomatic recurrent paroxysmal or persistent AF and were treated with at least 1 anti arrhythmic medication or intolerant to medication. The first group included 33 patients who underwent circumferential pulmonary veins isolation (PVI) for AF during 2012 and 2013 guided by CT image integration (Cartomerge, Biosense Webster, Diamond Bar, CA, United States) of left atrium and pulmonary veins into an electroanatomic mapping (EAM) system (CT group) using standard irrigated radiofrequency catheter (ThermoCool, Carto, Biosense Webster, Diamond Bar, CA, United States) or irrigated catheter with integrated CF sensor (Smart Touch, Carto, Biosense Webster, Diamond Bar, CA, United States)...
April 26, 2016: World Journal of Cardiology
Jonathan Rosenberg, Westby G Fisher, Mayra Guerrero, Steve Smart, Justin Levisay, Ted Feldman, Michael Salinger
Pulmonary vein stenosis (PVS) is an uncommon but serious complication following radiofrequency ablation for atrial fibrillation. Occurrence of this complication has risen with increased rates of ablation procedures, with >50,000 AF ablation procedures performed per year, and can occur within weeks to months post procedure. Currently, the main therapies for PVS include percutaneous interventions with balloon angioplasty and stenting, but these treatments are complicated by a high rate of restenosis. The optimal treatment for recurrent pulmonary vein in-stent restenosis has not been determined...
May 2016: Journal of Invasive Cardiology
Md Saiful Islam, Nassim Ammour, Naif Alajlan, Hatim Aboalsamh
BACKGROUND: Screening of atrial fibrillation (AF) for high-risk patients including all patients aged 65 years and older is important for prevention of risk of stroke. Different technologies such as modified blood pressure monitor, single lead ECG-based finger-probe, and smart phone using plethysmogram signal have been emerging for this purpose. All these technologies use irregularity of heartbeat duration as a feature for AF detection. We have investigated a normalization method of heartbeat duration for improved AF detection...
May 1, 2016: Computers in Biology and Medicine
Alexander Carpenter, Antonio Frontera
The newest generation of smart-watches offer heart rate monitoring technology via photoplethysmography, a technology shown to demonstrate impressive ability in diagnosing arrhythmias including atrial fibrillation. Combining such technology with the portability, connectivity and other location and activity tracking features smart-watches could represent a powerful new tool in extended non-invasive arrhythmia detection. The technology itself, including potential uses and limitations, is discussed. There is a need for further software development but crucially, further work into clarifying the diagnostic accuracy of such technology...
June 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
José Francisco Secorun Inácio, Michele dos Santos Gomes da Rosa, Julie Shah, Jeferson Rosário, João Ricardo Nickenig Vissoci, André Luiz Langer Manica, Clarissa Garcia Rodrigues
OBJECTIVES: Conduct a systematic review of the literature to compare the efficacy of different biphasic and monophasic shock waveforms technologies for transthoracic cardioversion of Atrial Fibrillation (AF). METHODS: We searched PubMed, EMBASE, The Cochrane Library, LILACS and databases for randomized clinical trials comparing two or more defibrillation waveforms when performing elective transthoracic cardioversion of AF. The outcomes assessed were 1st shock success, overall success, cumulative energy and number of shocks to restore Normal Sinus Rhythm...
March 2016: Resuscitation
C Butcher, Y Mareev, V Markides, M Mason, T Wong, J G F Cleland
Cardiac resynchronisation therapy (CRT) is an effective intervention for appropriately selected patients with heart failure, but exactly how it works is uncertain. Recent data suggest that much, or perhaps most, of the benefits of CRT are not delivered by re-coordinating left ventricular dyssynchrony. Atrio-ventricular resynchronization, reduction in mitral regurgitation and prevention of bradycardia are other potential mechanisms of benefit that will vary from one patient to the next and over time. Because there is no single therapeutic target, it is unlikely that any single measure will accurately predict benefit...
October 2015: Current Cardiology Reports
David Ryan King, Neil D Mehta, Anil K Gehi, Irion Pursell, Paul Mounsey, Prabhat Kumar, Ayo Bamimore, Eugene H Chung
BACKGROUND: It can be challenging to convince asymptomatic to minimally symptomatic patients to pursue treatment of their atrial fibrillation (AF). We hypothesized that once in sinus rhythm, asymptomatic to minimally symptomatic patients would realize they were compensating for moderate symptoms, and that we could quantify this via the Canadian Cardiovascular Society Severity of AF (CCS-SAF) score. METHODS: All patients in our study come from the Symptom Mitigation in Atrial Fibrillation (SMART) study...
September 2015: Journal of Clinical Medicine Research
Sigal Portnoy, Orli Halaby, Dotan Dekel-Chen, Frédéric Dierick
Pouring hot water from a kettle into a cup may prove a hazardous task, especially for the elderly or the visually-impaired. Individuals with deteriorating eyesight may endanger their hands by performing this task with both hands, relaying on tactilo-kinesthetic feedback (TKF). Auditory feedback (AF) may allow them to perform the task singlehandedly, thereby reducing the risk for injury. However since relying on an AF is not intuitive and requires practice, we aimed to determine if AF supplied during the task of pouring water can be used naturally as visual feedback (VF) following practice...
November 2015: Applied Ergonomics
Adin-Cristian Andrei, Patrick M McCarthy, James D Thomas, Travis O Abicht, S Chris Malaisrie, Zhi Li, Jane Kruse, Albert L Waldo, Hugh Calkins, James L Cox
BACKGROUND: Postsurgical late reinterventions for atrial fibrillation (AF) include cardioversions (CV) or catheter ablations (CA). Commonly used methods for reporting and modeling the frequency and timing of CA or CV have well-known shortcomings. OBJECTIVE: The purpose of this study was to present intuitive and robust methods to visualize, summarize, and model late reinterventions type/timing and vital status simultaneously. METHODS: We present (1) the SMART plot (Summary of Mortality And Outcomes Reported Over Time); (2) the reintervention mean cumulative function (MCF); and (3) the proportional means model and the proportional rates model...
July 2015: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Jo Woon Chong, Nada Esa, David D McManus, Ki H Chon
We hypothesize that our smartphone-based arrhythmia discrimination algorithm with data acquisition approach reliably differentiates between normal sinus rhythm (NSR), atrial fibrillation (AF), premature ventricular contractions (PVCs) and premature atrial contraction (PACs) in a diverse group of patients having these common arrhythmias. We combine root mean square of successive RR differences and Shannon entropy with Poincare plot (or turning point ratio method) and pulse rise and fall times to increase the sensitivity of AF discrimination and add new capabilities of PVC and PAC identification...
May 2015: IEEE Journal of Biomedical and Health Informatics
S Serge Barold, Andreas Kucher, Jochen Menne, Roland X Stroobandt
No abstract text is available yet for this article.
October 2015: Pacing and Clinical Electrophysiology: PACE
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