Abnormal Atrioventricular Nodal Response Patterns in Patients with Long-Term Chagas’ Disease

Pimenta, João; Miranda, Manoel; Silva, Lélio A

doi:10.1378/chest.78.2.310

Cited by 9 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As genetic testing was not feasible in our patient, we screened his family members for conduction abnormalities, of which there were none. Other conditions such as infiltrative disorders (lymphoma, sarcoidosis) and infective conditions (chagas) can present in a similar manner, but were ruled out in this index case 10 11…”

Section: Discussionmentioning

confidence: 98%

Trifascicular block progressing to complete AV block on exercise: a rare presentation demonstrating the usefulness of exercise testing

et al. 2015

View full text Add to dashboard Cite

SUMMARYA 41-year-old man presented with dyspnoea and giddiness on exertion for the last 1 month. A resting ECG during showed trifascicular block with complete right bundle branch block, left anterior fascicular block and a prolonged PR interval of >0.24 s. His echocardiography showed no evidence of wall motion abnormality. He was subjected to a treadmill test for exercise-induced ischaemia, which showed complete atrioventricular (AV) block during first stage of Bruce protocol. His symptoms of dyspnoea and giddiness were also reproduced. The test was terminated and ECG returned to trifascicular block, similar to that at his baseline ECG during recovery. Coronary angiogram (CAG) was performed to rule out any ischaemic cause for this exercise-induced AV block, which was normal. In view of his reproducible symptoms and demonstration of complete AV block on exercise, a dual-chamber pacemaker (DDD) was implanted. His symptoms disappeared and he remained asymptomatic on follow-up. BACKGROUND

show abstract

Section: Discussionmentioning

confidence: 98%

Trifascicular block progressing to complete AV block on exercise: a rare presentation demonstrating the usefulness of exercise testing

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The electrophysiological studies were performed by techniques described previously (Pimenta et al, 1980(Pimenta et al, , 1983Scherlag et al, 1969), with potential recordings from the high right atrium, left atrium (coronary sinus), and His bundle region, and endocavitary pacing, before and 20 minutes after intravenous injection of 5 mg of atenolol, while the patients were in sinus rhythm. The patients were subsequently followed in an outpatient clinic.…”

Section: Methodsmentioning

confidence: 99%

Effects of atenolol in patients with reciprocating supraventricular tachycardia

Pimenta

Pereira

1986

Clinical Cardiology

View full text Add to dashboard Cite

Summary:We studied 12 patients with crisis of paroxysmal reciprocating supraventricular tachycardia before and after intravenous injection of 5 mg of atenolol. The patients were then followed for periods ranging from 6 to 50 months (median 34 months). During this time, they received oral atenolol therapy, at 200 mg for the first two weeks, and 100 mg daily thereafter. Tachycardia was due to reciprocation within the atrioventricular node in 9 patients, and to pre-excitation in 3 patients. Atenolol slowed the sinus rate, prolonged the atrioventricular conduction time, and increased the atrial cycle length at which atrioventricular nodal Wenckebach phenomenon occurred. During the tachycardia, atenolol increased the tachycardia cycle length, due to prolongation of the intranodal atrioventricular conduction time. Of the 11 patients who were observed for the full period, 7 had no further episodes of arrhythmia. One patient (with left-sided pre-excitation) failed to respond to any antiarrhythmic medication, one patient remained free of symptoms for two years, but received an atrial pacemaker for control of the tachycardia at the end of this period. Two patients (one with dual atrioventricular nodal pathways, and one with concealed leftsided pre-excitation) await other treatment for their tachycardia, after remaining free of symptoms for one and two years, respectively. These findings suggest that atenolol is an effective beta blocker for use in controlling arrhythmias in patients with reciprocating supraventricular tachycardia, for use in once daily dosage, and is a medication largely free of side effects.

show abstract

“…As zonas de fibrose apresentam predileção pelo sistema excito-condutor (nó sinusal, nó atrioventricular, ramos e fascículos do sistema His-Purkinje), 433 sendo, frequentemente, manifestação primordial do acometimento cardíaco. A combinação de áreas de fibrose, disfunção autonômica e comprometimento do sistema excito-condutor favorece a ocorrência tanto de bradiarritmias quanto de taquiarritmias, muitas vezes antes que alterações estruturais cardíacas sejam detectadas por exames de imagem, como o ECO.…”

Section: 2 Métodos Diagnósticos De Alterações Cardíacas Estruturais E...unclassified

“…The zones of fibrosis have predilection for the conduction system (sinus node, atrioventricular node, and His-Purkinje system branches and fascicles), 433 being usually a primordial manifestation of cardiac involvement. The combination of areas of fibrosis, autonomic dysfunction, and conduction system impairment favors the occurrence of both bradyarrhythmias and tachyarrhythmias, sometimes before cardiac structural alterations are detected on imaging tests, such as ECHO.…”

Section: 27 Ambulatory Electrocardiography (Holter)mentioning

confidence: 99%

Diretriz da SBC sobre Diagnóstico e Tratamento de Pacientes com Cardiomiopatia da Doença de Chagas – 2023

Marin-Neto¹,

Rassi²,

Oliveira³

et al. 2023

Arquivos Brasileiros De Cardiologia

View full text Add to dashboard Cite

Abnormal Atrioventricular Nodal Response Patterns in Patients with Long-Term Chagas’ Disease

Cited by 9 publications

References 20 publications

Trifascicular block progressing to complete AV block on exercise: a rare presentation demonstrating the usefulness of exercise testing

Trifascicular block progressing to complete AV block on exercise: a rare presentation demonstrating the usefulness of exercise testing

Effects of atenolol in patients with reciprocating supraventricular tachycardia

Diretriz da SBC sobre Diagnóstico e Tratamento de Pacientes com Cardiomiopatia da Doença de Chagas – 2023

Contact Info

Product

Resources

About