{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["23(2)"],"submitter":["Albizreh B"],"pubmed_abstract":["We are reporting a case of a young Nepalese man, who was not known to have any past medical history, and who presented with palpitations. An electrocardiogram showed negative P-waves atrial rhythm in II, III, arteriovenous fistula, and V3-V6 with a variable block at 90-130 bpm. No positive \"normal\" P-waves were demonstrated in any tracing. He was found to have a congenital absence of the right superior vena cava (RSVC) along with persistent left superior vena cava (PLSVC) a condition also called isolated PLSVC (IPLSC). He underwent a treadmill stress test for further evaluation which showed a normal chronotropic response and the same persistent negative P-waves morphology. An invasive electroanatomical and activation mapping showed an absence of RSVC, the earliest atrial activation site in"],"journal":["Heart views : the official journal of the Gulf Heart Association"],"pagination":["113-117"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9542964"],"repository":["biostudies-literature"],"pubmed_title":["An Ectopic Primary Pacemaker in Association with Isolated Persistent Left Superior Vena Cava."],"pmcid":["PMC9542964"],"pubmed_authors":["Al Jefairi N","Albizreh B","Hamid S","Asaad N","Elmagraby A"],"additional_accession":[]},"is_claimable":false,"name":"An Ectopic Primary Pacemaker in Association with Isolated Persistent Left Superior Vena Cava.","description":"We are reporting a case of a young Nepalese man, who was not known to have any past medical history, and who presented with palpitations. An electrocardiogram showed negative P-waves atrial rhythm in II, III, arteriovenous fistula, and V3-V6 with a variable block at 90-130 bpm. No positive \"normal\" P-waves were demonstrated in any tracing. He was found to have a congenital absence of the right superior vena cava (RSVC) along with persistent left superior vena cava (PLSVC) a condition also called isolated PLSVC (IPLSC). He underwent a treadmill stress test for further evaluation which showed a normal chronotropic response and the same persistent negative P-waves morphology. An invasive electroanatomical and activation mapping showed an absence of RSVC, the earliest atrial activation site in","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Apr-Jun","modification":"2025-04-25T17:36:26.176Z","creation":"2025-04-06T05:04:48.746Z"},"accession":"S-EPMC9542964","cross_references":{"pubmed":["36213426"],"doi":["10.4103/heartviews.heartviews_90_21"]}}