Studies on Sino-Caval Conduction of the Rabbit With Microelectrodes

Ito, Morio; Yanaga, T; Saeki, Kazuyuki; Arita, Makoto; Ishihara, Motoichi; Mashiba, Hiroto

doi:10.2170/jjphysiol.14.439

Cited by 10 publications

(10 citation statements)

References 8 publications

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“…As to the conduction of the atrial action potentials and contractions to the venae cavae, several papers have already been published (MASHIBA et al, 1963;ITO et al, 1964 andARITA et al, 1966 andARITA, 1966). However, we have as yet very little information on the transmission of impulses from the ventricles to the stem arteries (aorta or pulmonary trunk) as well as their M. ARITA, H. KAWATA AND M. GOTO bulbi, except for a few reports on the amphibia; i. e., a newt or a toad , using a microelectrode (see MAKI and SUZUKI, 1966).…”

Section: Discussionmentioning

confidence: 99%

Measurement of Spontaneous Electrical Activity in the Guinea Pig Pulmonary Bulbus by a Microelectrode

1969

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Section: Discussionmentioning

confidence: 99%

Measurement of Spontaneous Electrical Activity in the Guinea Pig Pulmonary Bulbus by a Microelectrode

1969

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“…Recent evidences from our laboratory show that conduction of impulse from the sinus node or sinus venosus to the blood vessels proximal to the heart occurs not only in the rabbit venae cavae 10,19), but also in the frog venae cavae 17,20), the maus pulmonary veins (atriopulmonary conduction)18) and the bufo bulbus (ventriculobulbar conduction) 16). On the basis of these results, Mashiba and cowokers have extented the concept of sinocaval conduction to that of cardiovascular conduction 17,18,20. In the most primitive circulating systems, there can be seen little or no functional and histological differentiations between the heart and blood vessels; even in such a stage, for examples, in the pulsating vessels of the earth worms20 and the cardiac tubes of the chick embryos 2), the initiation and conduction of electrical impulses occur.…”

Section: Discussionmentioning

confidence: 99%

Functional Properties of Sinocaval Conduction

et al. 1967

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Previously we have reported that in the rabbit the sinus node impulse spreads not only to the atrial muscle but also to the musculature in the venae cavae proximal to the heart10, 19). On the basis of this result, Mashiba and coworkers have introduced into electrophysiology the concept of sinocaval conduction. Recently ARITA and coworkers reported on the mechanical activity of the vena caval muscle of the rabbito. Further studies on the sinocaval conduction of the rabbit have revealed that the transmission of the sinus node impulse to the superior venae cavae is delayed during passage through three different sites: one is the sinus node and the others are the junctions of right and left superior venae cavae with the right atrium. These junctional areas have been found to take over the function of impulse initiation under certain conditions. We have called them the sinocaval (SC) areas. The present paper mainly deals with the functional properties of the SC areas. METHODSThe experimental methods employed here were the same as described prey iouslylo. RESULTS

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“…9 Despite these very early observations, investigation of the anatomic and electrophysiologic properties of the PVs remained limited, until the importance of PV triggers in the development of AF was appreciated. PV focal firing by abnormal automaticity and triggered activity may trigger AF or act as a rapid driver to maintain AF.…”

Section: Electrophysiology Of the Pvmentioning

confidence: 99%

Catheter Ablation of Atrial Fibrillation

Kumagai

2011

Circ J

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Atrial fibrillation (AF) is an arrhythmia associated with increased morbidity and mortality. Since the first report of catheter ablation curing AF, numerous techniques have evolved, from linear ablation to segmental pulmonary vein (PV) isolation, to extensive encircling PV isolation, to left atrial (LA) linear ablation, to ablation of complex fragmented atrial electrograms (CFAEs) and ablation of ganglionated plexi. A new approach for complete isolation of the posterior LA, including all PVs, is box isolation. PV isolation is associated with a high clinical success rate in paroxysmal AF. However, in persistent AF or longstanding persistent AF, PV isolation only may not be sufficient, so additional ablation at sites with CFAEs is needed to improve the clinical outcome. A hybrid approach of combining PV isolation plus CFAE ablation is highly effective in the majority of patients with persistent AF or longstanding persistent AF. Thus, AF ablation is an effective and established treatment for AF that offers an excellent chance of a lasting cure. It is about time that AF ablation became a first-line therapy for selected patients with AF. (Circ J 2011; 75: 2305 - 2311

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Studies on Sino-Caval Conduction of the Rabbit With Microelectrodes

Cited by 10 publications

References 8 publications

Measurement of Spontaneous Electrical Activity in the Guinea Pig Pulmonary Bulbus by a Microelectrode

Measurement of Spontaneous Electrical Activity in the Guinea Pig Pulmonary Bulbus by a Microelectrode

Functional Properties of Sinocaval Conduction

Catheter Ablation of Atrial Fibrillation

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