New PDF release: Atrial Fibrillation

By John Rawles BSc, MB, BS, FRCP, FRCP (Edin) (auth.)

ISBN-10: 1447118987

ISBN-13: 9781447118985

ISBN-10: 1447119002

ISBN-13: 9781447119005

Atrial traumatic inflammation is a typical and significant arrythmia which impacts nearly5% of peopple over 70. This synthesis of present wisdom that is established onmuch unique paintings through the writer brings togeher for the 1st time the numerous components of boost in recent times and may aid to make specialists from the hugely specialized fields inside cardiology conscious of the advancements withinothers.

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Example text

The curve depicting the relationship between the delay in the stimulus and the duration of depolarisation is called the restitution curve. The shape and position of the restitution curve is affected by the basic ventricular rate, being depressed at higher heart rates. With a change of ventricular rate the duration of depolarisation, and the QT interval, changes immediately and then more gradually over the ensuing few minutes (Seed et al. 1987). Atrial fibrillation is characterised by marked beat-to-beat changes of heart rate, with a wide range of mean heart rates in different subjects.

Am J Cardiol 55:1168-74 Fromer M, Gloor H, Kappenberger L (1985) [Effect of heart rate on the refractory period of the accessory atrioventricular pathway in Wolff-Parkinson-White syndrome]. Schweiz Med Wochenschr 115:1545-51 Fujimura 0, Klein GJ, Yee R, Sharma AD, Boahene KA (1990) Atrial fibrillation in the WolffParkinson-White syndrome. In: Touboul P, Waldo AL (eds) Atrial arrhythmias. Current concepts and management. Mosby Year Book, St Louis, pp 262-9 Garber EB, Morgan MG, Glasser SP (1976) Left atrial size in patients with atrial fibrillation: an echocardiographic study.

The maximum ventricular rate during re-entry tachycardia is determined by the refractory periods of the atrioventricular node and the accessory pathway (Castellanos et al. 1975; Milstein et al. 1986), but the mean ventricular rate during atrial fibrillation is not accurately predicted by any electrophysiological measurements (Brugada et al. 1984). Atrial fibrillation seems to occur rather more commonly in the WolffParkinson-White syndrome than might be expected, particularly since most subjects with this syndrome have no overt heart disease (Gressard et al.

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Atrial Fibrillation by John Rawles BSc, MB, BS, FRCP, FRCP (Edin) (auth.)


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