8 patients (male/female: 1) with ages of 18-63 diagnosed as arrhythmias but not classify the type of arrhythmias who received the transesophageal electrocardiogram. The results have shown that the transesophageal electrocardiogram increased the umplitude and displayed clearly the atriogram which help determined diagnosing, especially differentially diagnosing the ventricular and supraventricular tachycardiac. This was a simple technique that can be applied in the local levels to diagnose some arrhythmias
Echocardiography, Transesophageal ; Electrocardiography ; Arrhythmia ; diagnosis

In order to assess the diagnostic value of invasive electrophysiologic study (EPS) in the patients with unexplained syncope, the electrophysiologic findings of 268 patients with unexplained syncope despite a complete clinical evaluation were analyzed. Results showed positive EPS finding was 38% in total patients and 50% in the patients aged > 70 years. With increasing age, the diagnostic yield of EPS also increased. No significant differences of complication rate were found among the different age groups. It was concluded that EPS have high diagnostic value in the patients with unexplained syncope. Its complications are few and mild. EPS may be recommended in elderly patients with unexplained syncope.
Age Factors ; Arrhythmia/complications ; Arrhythmia/*diagnosis ; Diagnosis, Differential ; *Electrocardiography ; Electrophysiology ; Follow-Up Studies ; Monitoring, Physiologic ; Retrospective Studies ; Syncope/diagnosis ; Syncope/*etiology ; Tachycardia/complications ; Tachycardia/diagnosis

Humans ; COVID-19/complications* ; Arrhythmias, Cardiac/diagnosis* ; Anti-Arrhythmia Agents/therapeutic use*

As is known in literature, the Base-scale Entropy Measure is useful for analyzing short-term heart rate variability signals. In this study, the method is applied to detect cardiac arrhythmias, including sinus and atrial arrhythmia. We detect and analyze normal sinus rhythm (NSR), atrial premature contraction (APC) and sinus bradycardia (SBR) signals. The selected data of NSR are obtained from the MIT-BIH normal sinus database, while others are from the MIT-BIH arrhythmia database. The results show the Base-scale Entropy can also detect sinus and atrial arrhythmia.
Algorithms ; Arrhythmia, Sinus ; diagnosis ; physiopathology ; Atrial Premature Complexes ; diagnosis ; physiopathology ; Electrocardiography ; Entropy ; Humans ; Signal Processing, Computer-Assisted

This study sought to disclose whether Hurst index can be used as a criterion for distinguishing sinus and atrial arrhythmia signals. Normal sinus rhythm beats, atrial premature contraction (APC) beats, and sinus bradycardia (SBR) signals, were taken from the MIT-BIH standard database. Hurst index method was used to distinguish the two kinds of arrhythmia. The results showed that the Hurst exponents of three kinds of signals were larger than 0.5, but they were in different value region. The data indicated that the long-term relevant character was the best for normal signal, better for sinus bradycardia, and the worst for atrial premature beats. So Hurst index is a useful identification criterion for distinguishing sinus and atrial arrhythmia signals.
Algorithms ; Arrhythmia, Sinus ; diagnosis ; physiopathology ; Atrial Premature Complexes ; diagnosis ; physiopathology ; Bradycardia ; diagnosis ; physiopathology ; Diagnosis, Differential ; Electrocardiography ; Humans ; Signal Processing, Computer-Assisted

Amiodarone ; therapeutic use ; Aneurysm, False ; diagnosis ; Anti-Arrhythmia Agents ; therapeutic use ; Arrhythmias, Cardiac ; diagnosis ; drug therapy ; Cardiomyopathies ; diagnosis ; drug therapy ; Humans ; Male ; Middle Aged

No abstract available.
Aged ; Amiodarone/*adverse effects/therapeutic use ; Anti-Arrhythmia Agents/*adverse effects/therapeutic use ; Hepatitis, Alcoholic/diagnosis/etiology ; Hepatitis, Chronic, Drug-Induced/*diagnosis/etiology/pathology ; Humans ; Male

To explore the energy proportion of the QRS complexes in the electrocardiogram (ECG), a new method, wavelet analysis, has been presented. Using wavelet transform of ECG, we can calculate the energy proportion of QRS complexes in multiple scales. The electrocardiograms (ECGs) were used as the experimental data, which were collected from a young (21-34 yr) group and an elderly (68-81 yr) group of healthy subjects, as well as from a group of arrhythmia patients (66-81 yr). the data analysis was performed with the energy proportion of the QRS complexes in the ECG using Mexican-Hat as a mother wavelet in multiple scales. Results showed that the energy proportion of the QRS complexes had no changes with ages increasing (P > 0.44), but in the same age group, the arrhythmia patients' energy proportion of the QRS complexes near 17Hz are obviously less than that in the healthy group (P < 0.01), so the energy proportion of the QRS complexes calculated by wavelet analysis can be used as a feature index to judge whether a person is a sinus arrhythmia patient or not.
Adult ; Aged ; Aged, 80 and over ; Arrhythmia, Sinus ; diagnosis ; physiopathology ; Arrhythmias, Cardiac ; physiopathology ; Electrocardiography ; methods ; Female ; Humans ; Male ; Middle Aged ; Wavelet Analysis ; Young Adult

We report the case of a 19-year-old male who successfully recovered from sudden cardiac arrest. Careful evaluation did not reveal any electrical or structural abnormalities. He underwent implantable cardioverter defibrillator (ICD) implantation, with a diagnosis of idiopathic ventricular fibrillation (VF). Three months later, VF recurred and was successfully terminated by ICD shock. Electrocardiogram (ECG) revealed a slurred type J point elevation at the inferolateral leads with a horizontal/descending ST segment change, which was not present during the initial hospitalization. Cilostazol was prescribed to prevent further lethal ventricular arrhythmias. Subsequently, no arrhythmic events were reported, and the J wave disappeared at the follow-up ECG. However, recurrent VF episodes with an interval of 1–2 weeks occurred 1 year later, and were terminated by ICD shock. Simultaneous ECG revealed a J point elevation at the inferolateral leads. Cilostazol was replaced by quinidine. Subsequently, no arrhythmic event recurred for over 12 months. Serial follow-up ECG is needed to identify masked inherited primary arrhythmic syndromes in sudden cardiac arrest survivors diagnosed with idiopathic VF. Cilostazol and quinidine might be good therapeutic options to prevent further lethal events in cases where the J wave syndrome is present with recurrent ventricular arrhythmias.
Anti-Arrhythmia Agents ; Arrhythmias, Cardiac ; Death, Sudden, Cardiac* ; Defibrillators ; Diagnosis ; Electrocardiography ; Follow-Up Studies ; Heart Arrest ; Hospitalization ; Humans ; Male ; Masks ; Quinidine ; Shock ; Survivors ; Ventricular Fibrillation ; Young Adult

Arrhythmias in the neonatal period are not uncommon, and may occur in neonates with a normal heart or in those with structural heart disease. Neonatal arrhythmias are classified as either benign or nonbenign. Benign arrhythmias include sinus arrhythmia, premature atrial contraction, premature ventricular contraction, and junctional rhythm; these arrhythmias have no clinical significance and do not need therapy. Supraventricular tachycardia, ventricular tachycardia, atrioventricular conduction abnormalities, and genetic arrhythmia such as congenital long-QT syndrome are classified as nonbenign arrhythmias. Although most neonatal arrhythmias are asymptomatic and rarely life-threatening, the prognosis depends on the early recognition and proper management of the condition in some serious cases. Precise diagnosis with risk stratification of patients with nonbenign neonatal arrhythmia is needed to reduce morbidity and mortality. In this article, I review the current understanding of the common clinical presentation, etiology, natural history, and management of neonatal arrhythmias in the absence of an underlying congenital heart disease.
Arrhythmia, Sinus ; Arrhythmias, Cardiac* ; Atrial Premature Complexes ; Diagnosis* ; Heart ; Heart Defects, Congenital ; Heart Diseases ; Humans ; Infant, Newborn ; Mortality ; Natural History ; Prognosis ; Tachycardia, Supraventricular ; Tachycardia, Ventricular ; Ventricular Premature Complexes