A Markov-model based technique is proposed to automatically detect a patient's disease state into different subclasses of Supraventricular arrhythmia based upon automated ECG analysis. Separate Markov-models have been developed for each subclass using a finer resolution of P-waves that takes into account left and right atria and multiple slopes of the P-waves. ECG data from Physionet database h...

Dr. Levine's comments1 are greatly appreciated. Most modern ICDs have arrhythmia discrimination algorithms that have variable success in withholding inappropriate therapy. It must be borne in mind that enhancing specificity for ventricular arrhythmia detection can entail a loss of sensitivity. Accordingly, all algorithms necessarily err on the side of safety and will withhold therapy for only b...

BACKGROUND Asymptomatic, or "silent" atrial fibrillation could increase the risk of stroke. Little is known about the frequency of asymptomatic atrial fibrillation in patients who also have symptomatic atrial fibrillation; similarly, little is known about the effect of antiarrhythmic drug therapy on asymptomatic atrial fibrillation. METHODS AND RESULTS Patients in sinus rhythm with a history ...

T lIE TECIINIC of external electrical couniitersloock for the emergency termina-tioni of ven.tricular fibrillationi has been receivilmio wide application since the reports of Zoll and associates' anid Kouweiihoven anid associattesS The deliberate, elective applica-tioni of this form of therapy has recently been rleported for the ter,iiinationi of ventricular 1achycardia.3 With externiial electr...

BACKGROUND The purpose of this study was to determine the rate and causes of inappropriate rhythm detection, and to compare adequacy of ventricular arrhythmia detection by single-chamber and dual-chamber cardioverter-defibrillators (ICD). METHODS We evaluated 190 patients (age 57.2 +/- 11.2 years) with ICD. FOLLOW-UP 34.3 +/- +/- 22 months. Dual-chamber ICD was used in 54 patients. RESULT...

CARDIAC STATUS AND HEALTH-RELATED QUALITY OF LIFE IN THE LONG TERM AFTER SURGICAL REPAIR OF TETRALOGY OF FALLOT IN INFANCY AND CHILDHOOD The long-term results of surgical repair of tetralogy of Fallot were assessed by means of extensive cardiologic examination of 77 nonselected patients 14.7 -+ 2.9 years after surgical repair of tetralogy of Fallot in infancy and childhood. Because of the frequ...

The electrocardiograph (ECG) was recorded continuously in 20 children undergoing adenoidectomy during halothane anaesthesia. Five surface ECG leads and an oesophageal lead were used. In 11 children, there were QRS complexes which had a shape distinctly different from that of the ordinary sinus-evoked beats. Except in one child, these anomalous QRS complexes first made their appearance during su...