The development of L-type Ca


Journal

Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288

Informations de publication

Date de publication:
17 08 2021
Historique:
received: 26 02 2021
accepted: 23 07 2021
entrez: 18 8 2021
pubmed: 19 8 2021
medline: 11 11 2021
Statut: epublish

Résumé

Cardiac alternans have crucial importance in the onset of ventricular fibrillation. The early explanation for alternans development was the voltage-driven mechanism, where the action potential (AP) restitution steepness was considered as crucial determining factor. Recent results suggest that restitution slope is an inadequate predictor for alternans development, but several studies still claim the role of membrane potential as underlying mechanism of alternans. These controversial data indicate that the relationship of restitution and alternans development is not completely understood. APs were measured by conventional microelectrode technique from canine right ventricular papillary muscles. Ionic currents combined with fluorescent measurements were recorded by patch-clamp technique. APs combined with fluorescent measurements were monitored by sharp microelectrodes. Rapid pacing evoked restitution-independent AP duration (APD) alternans. When non-alternating AP voltage command was used, Ca

Identifiants

pubmed: 34404848
doi: 10.1038/s41598-021-95299-7
pii: 10.1038/s41598-021-95299-7
pmc: PMC8371021
doi:

Substances chimiques

Calcium SY7Q814VUP

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

16652

Informations de copyright

© 2021. The Author(s).

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Auteurs

Noémi Tóth (N)

Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Dóm tér 12, P.O. Box 427, 6720, Szeged, Hungary.

Jozefina Szlovák (J)

Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Dóm tér 12, P.O. Box 427, 6720, Szeged, Hungary.

Zsófia Kohajda (Z)

ELKH-SZTE Research Group of Cardiovascular Pharmacology, Szeged, Hungary.

Gergő Bitay (G)

Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Dóm tér 12, P.O. Box 427, 6720, Szeged, Hungary.

Roland Veress (R)

Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.

Balázs Horváth (B)

Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
Faculty of Pharmacy, University of Debrecen, Debrecen, Hungary.

Julius Gy Papp (JG)

Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Dóm tér 12, P.O. Box 427, 6720, Szeged, Hungary.
ELKH-SZTE Research Group of Cardiovascular Pharmacology, Szeged, Hungary.

András Varró (A)

Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Dóm tér 12, P.O. Box 427, 6720, Szeged, Hungary.
ELKH-SZTE Research Group of Cardiovascular Pharmacology, Szeged, Hungary.
Department of Pharmacology and Pharmacotherapy, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary.

Norbert Nagy (N)

Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Dóm tér 12, P.O. Box 427, 6720, Szeged, Hungary. nagy.norbert@med.u-szeged.hu.
ELKH-SZTE Research Group of Cardiovascular Pharmacology, Szeged, Hungary. nagy.norbert@med.u-szeged.hu.

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Classifications MeSH