scholarly journals Electrical activity of the pulmonary vein and its interaction with the right atrium in the guinea-pig.

1981 ◽  
Vol 314 (1) ◽  
pp. 445-456 ◽  
Author(s):  
D W Cheung
Keyword(s):  
Guinea Pig ◽  
Electrical Activity ◽  
Pulmonary Vein ◽  
Right Atrium ◽  
The Right

Calcitonin gene-related peptide as potential neurotransmitter in guinea pig right atrium

1986 ◽  
Vol 250 (4) ◽  
pp. H693-H698 ◽  
Author(s):  
A. Saito ◽  
S. Kimura ◽  
K. Goto
Keyword(s):  
Guinea Pig ◽  
Right Atrium ◽  
Sinus Node ◽  
Calcitonin Gene Related Peptide ◽  
Dependent Manner ◽  
Chronotropic Response ◽  
Related Peptide ◽  
Calcitonin Gene ◽  
The Right

The potential neurotransmitter role of calcitonin gene-related peptide (CGRP) in cardioacceleratory nonadrenergic noncholinergic (NANC) nerves was examined in the guinea pig right atrium in vitro. In the presence of atropine, a muscarinic antagonist, and atenolol, a beta-adrenoceptor antagonist, transmural nerve stimulation (TNS) of the isolated right atrium caused a positive chronotropic response, which is slow in both onset and decay. This TNS-induced slow response was assumed to be mediated by NANC nerves in the right atrium since tetrodotoxin inhibited the response. Dense distribution of CGRP-like immunoreactive (CGRP-I) nerves was demonstrated in the sinus node. Exogenously applied CGRP exerted a positive chronotropic effect on the isolated right atrium in a dose-dependent manner. Both CGRP-I nerves and NANC response induced by TNS were not affected by surgical sympathectomy and reserpine pretreatment but were abolished by the pretreatment of animals with capsaicin. The results suggest that CGRP is the neurotransmitter of cardioacceleratory NANC nerves in the right atrium of the guinea pig.

Blunt Traumatic Rupture of the Right Atrium and the Right Superior Pulmonary Vein

1983 ◽  
Vol 23 (Sup 6) ◽  
pp. 353-355 ◽  
Author(s):  
ROSS F. DIMARCO ◽  
THOMAS R. LAYTON ◽  
GENE W. MANZETTI ◽  
RONALD V. PELLEGRINI
Keyword(s):  
Pulmonary Vein ◽  
Right Atrium ◽  
Traumatic Rupture ◽  
Superior Pulmonary Vein ◽  
The Right

scholarly journals Technique for detecting an electrical connection between the right atrium and right pulmonary venous carina

2021 ◽  
Author(s):  
Ippei Tsuboi ◽  
Michio Ogano ◽  
Kei Kimura ◽  
Hidekazu Kawanaka ◽  
Masaharu Tajiri ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Adipose Tissue ◽  
Pulmonary Vein ◽  
Right Atrium ◽  
Clinical Characteristics ◽  
Epicardial Adipose Tissue ◽  
Posterior Wall ◽  
Right Atrial ◽  
The Right ◽  
Activation Mapping

Introduction: There is increasing evidence of the epicardial connection between the right-sided pulmonary vein (PV) carina and right atrium interrupts right-sided PV isolation after circumferential PV ablation in patients with atrial fibrillation. In such cases, carina ablation is often required. This study aimed to assess the utility of the right atrial posterior wall (RAPW) pacing in the detection of the right-sided epicardial connection (EC), evaluate the requirement for additional carina ablation after circumferential pulmonary vein (PV) ablation depending on the presence of EC, and investigate the clinical characteristics including the amount of epicardial adipose tissue (EAT) in patients with ECs. Methods and Results: Forty-one patients scheduled for PV isolation were enrolled. Before ablation, activation mapping of the LA was prospectively performed during pacing from the RAPW. EC was observed in 12 patients (EC group, 29%), whereas no EC was observed in the remaining 29 patients (non-EC group, 71%). For PV isolation, carina ablation was required in addition to circumferential ablation in 7 patients (58%) in the EC group, compared to 2 patients (7%) in the non-EC group (p < 0.003). Periatrial and intercaval EAT volumes were significantly lower (12.8 ± 6.2 vs. 23.1 ± 13.9 ml/m , p < 0.02, and 1.1 ± 0.8 vs. 2.2 ± 1.6 ml/m , p< 0.02, respectively) and the patients were younger (66.5 ± 6.6 vs. 72.4 ± 8.3 years, p < 0.03) in the EC group than in the non-EC group. Conclusions: RAPW pacing revealed EC between the RA and right PV carina in nearly a quarter of the patients.

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