PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 2741517

[Testing a computer program for use in cardiology].

R Poll·I Torrau
View original source ↗Export metadata ↓

Abstract

An already published method for automatic processing of a single ECG signal was tested on the base of a data set of a foreign clinic. The yielded results of the P-wave recognition (recognition ratio 87.1% with a failure ratio of 6.0%) confirm fully its reliability reported before. This paper gives a valuation of the method from the clinical point of view by reference to literature considering technical questions. The most important application of this method is the ECG processing under pressure requiring precise time - measuring, classification of separate patterns and recognition even of non-marked parts of the signal course as P-waves, ST-segments and T-waves. Methodical adaption of the method to the special range of application is necessary in all cases. General questions for prospective evaluation of a given automatic recognition system by physicians are discussed briefly.

Explore related subjects

Arrhythmias, CardiacElectrocardiographyHeart Conduction SystemHumansHypertensionMicrocomputersMyocardial InfarctionProspective StudiesSignal Processing, Computer-AssistedSoftwareEnglish AbstractJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

R Poll, I Torrau. 1989-04-15. [Testing a computer program for use in cardiology].. https://pubmed.ncbi.nlm.nih.gov/2741517/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1992

Analysis of vagally induced sinus arrhythmias.

Vagal stimulation at precise times in successive cardiac cycles can elicit sinus arrhythmias. Two mechanisms have been identified that can, but do not necessarily, cause these vagally induced sinus arrhythmias. First, changes in cycle length elicited by a given concentration of acetylcholine (ACh) depend on the phase of the pacemaker cell action potential when the ACh binds to muscarinic receptors. Second, acetylcholinesterase degrades ACh rapidly enough for the mean concentration of ACh per cardiac cycle to vary from cycle to cycle. We used a mathematical model of the underlying cellular physiology, to examine whether these mechanisms are responsible for arrhythmogenesis. Computer simulation showed that both mechanisms contribute to the vagally induced sinus arrhythmias.

Arrhythmias, Cardiac↗
PubMed1992

Prognosis of patients with sustained ventricular tachycardia and of survivors of cardiac arrest not inducible by programmed stimulation.

The aim of this study was to analyze the long-term clinical outcome of 60 prospectively studied patients with documented sustained ventricular tachyarrhythmia that was not inducible during baseline programmed ventricular stimulation: 39 with cardiac arrest due to noninfarction ventricular fibrillation (VF) and 21 with mild hemodynamically compromising sustained ventricular tachycardia (VT). Left ventricular ejection fraction was 55 +/- 14% in the VF group and 50 +/- 13% in the VT group (difference not significant). Patients were discharged without conventional antiarrhythmic drugs and received only empirical beta-blocker therapy. During a mean follow-up period of 21 +/- 16 months (mean +/- SD), 10 of 60 patients (17%) died suddenly. The actuarial incidence of sudden death at 1 and 4 years was similar in both groups (VF group, 10 and 20%; VT group, 16 and 16%) (p = 0.48). The actuarial incidence of sudden cardiac death was significantly higher in patients with left ventricular ejection fraction < or = 40% than in those with > 40% (1-year incidence in VF group, 40 vs 0%; VT group, 50 vs 0%) (p = 0.005 and p = 0.01, respectively). Multivariate regression analysis identified left ventricular ejection fraction < or = 40% and previous myocardial infarction as the only independent predictor of sudden cardiac death. The occurrence of frequent ventricular pairs during Holter monitoring was the only independent predictor of sustained VT recurrences. It is concluded that patients with sustained ventricular tachyarrhythmia in whom arrhythmia was non-inducible during baseline ventricular stimulation and not treated with antiarrhythmic therapy have a favorable outcome if left ventricular ejection fraction is high.(ABSTRACT TRUNCATED AT 250 WORDS)

Arrhythmias, Cardiac↗