ABC of clinical electrocardiography: Introduction. I---Leads, rate, rhythm, and cardiac axis

Meek, S. C.

doi:10.1136/bmj.324.7334.415

Cited by 108 publications

(64 citation statements)

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“…Absolute risk of AF in years since baseline electrocardiography divided into lowest, highest, and middle quintiles for the P AREA/DURATION index F I G U R E 5 Absolute risk of mortality for P-wave area/P-wave duration index. Absolute risk of mortality in years since baseline electrocardiography divided into lowest, highest, and middle quintiles for the P AREA/DURATION index II is known to be the best lead for evaluating P waves (Meek et al, 2002).…”

Section: F I G U R Ementioning

confidence: 99%

P‐wave indices as predictors of atrial fibrillation

Rasmussen

Kumarathurai

Fabricius‐Bjerre

et al. 2020

Noninvasive Electrocardiol

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Background P‐wave duration (PDURATION) and P‐wave area (PAREA) have been linked to risk of atrial fibrillation (AF), but they do not improve the efficacy of Framingham AF risk score. We suggest the incorporation of both variables in one index, the P‐wave area/P‐wave duration (PAREA/DURATION) index, which may be considered an expression of the average amplitude of the P wave that reflects aspects of P‐wave morphology. Objective To assess the prognostic value of P‐wave area/P‐wave duration index (PAREA/DURATION index) in lead II together with other P‐wave indices (PWIs) in incidence of AF in the Copenhagen Holter Study. Methods The study included 632 men and women, between 55 and 75 years with no apparent heart disease or AF. Baseline standard 12‐lead Electrocardiography (ECGs) were analyzed manually. Results The median follow‐up time was 14.7 (14.5;14.9) years. A total of 68 cases of AF and 233 cases of death were recorded. The restricted cubic spline method showed a U‐shaped association between PAREA/DURATION and rate of AF. The lowest quintile of PAREA/DURATION index in lead II was associated with increased rate of AF, HR 2.80 (1.64–4.79). The addition of the new index to the Framingham model for AF improved the model in this population. The PAREA in lead II in its lowest quintile was also associated with increased rate of AF, HR 2.16 (1.25–3.75), but did not improve the Framingham model. PDURATION and P‐wave terminal force (PTF) were not significantly associated with AF. Conclusion A flat P wave as expressed by a small PAREA/DURATION index in lead II is associated with increased rate of incident AF beyond known AF risk factors.

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Section: F I G U R Ementioning

confidence: 99%

P‐wave indices as predictors of atrial fibrillation

Rasmussen

Kumarathurai

Fabricius‐Bjerre

et al. 2020

Noninvasive Electrocardiol

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“…The QRS complex is a recording of a single heart beat and it corresponds to the depolarization of the ventricles [9,10]. Ventricular tachycardia is a fast heart rhythm originating in one of the ventricles of a heart.…”

Section: Applicationsmentioning

confidence: 99%

Impact of difference in WBAN channel models on UWB system performance

Viittala

Hämäläinen

Iinatti

2010

2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications

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Abstract-In this paper, the performances of two singleband ultra wideband (UWB) systems, i.e., direct sequence UWB (DS-UWB) and UWB frequency modulation (UWB-FM) are studied in two different channel models to reveal an impact of a channel model on the system's performance. The applied channel models are the experimental wireless body area network (WBAN) channel model developed at the Centre for Wireless Communications (CWC), Finland, and the IEEE 802.15.6 channel model. The simulation results indicate that the choice of the WBAN channel model applied in the simulations has a major impact on the performance of UWB-FM, whereas it is not such a crucial in the case of DS-UWB.

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“…[1][2][3][4] The electrocardiogram (ECG) reflects the electric function of the myocardium. 5 Changes in the ECG may represent a source of information during the provision of advanced life support (ALS) to such patients.…”

Section: Introductionmentioning

confidence: 99%

The effect of intravenous adrenaline on electrocardiographic changes during resuscitation in patients with initial pulseless electrical activity in out of hospital cardiac arrest

et al. 2019

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Introduction: Presence of electrocardiographic rhythm in the absence of palpable pulses defines pulseless electrical activity (PEA) and the electrocardiogram (ECG) may provide a source of information during resuscitation. The aim of this study was to examine the development of ECG characteristics during advanced life support (ALS) from Out-of-hospital cardiac arrest (OHCA) with initial PEA, and to explore the potential effects of adrenaline on these characteristics. Methods: Patients with OHCA and initial PEA, part of randomized controlled trial of ALS with or without intravenous access and medications, were included. A total of 4840 combined observations of QRS complex rate (heart rate) and width were made by examining defibrillator recordings from 170 episodes of cardiac arrest. Results: We found Increased heart rate (47 beats per minute) and reduced QRS complex width (62 ms) during ALS in patients who obtained return of spontaneous circulation (ROSC); while patients who received adrenaline but died increased their heart rate (22 beats per minute) without any concomitant decrease in QRS complex width. Conclusion: ECG changes during ALS in cardiac arrest were associated with prognosis, and the administration of adrenaline impacted on these changes.

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ABC of clinical electrocardiography: Introduction. I---Leads, rate, rhythm, and cardiac axis

Cited by 108 publications

References 0 publications

P‐wave indices as predictors of atrial fibrillation

P‐wave indices as predictors of atrial fibrillation

Impact of difference in WBAN channel models on UWB system performance

The effect of intravenous adrenaline on electrocardiographic changes during resuscitation in patients with initial pulseless electrical activity in out of hospital cardiac arrest

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