Publications by authors named "Kohei Kawajiri"

3 Publications

  • Page 1 of 1

One-point posterior ablation for complete isolation of the posterior left atrium.

HeartRhythm Case Rep 2020 Oct 14;6(10):738-740. Epub 2020 Jul 14.

Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, Tokyo, Japan.

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http://dx.doi.org/10.1016/j.hrcr.2020.07.003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7573377PMC
October 2020

Novel mapping algorithm during catheter ablation for ventricular parasystole originating from left anterior fascicle.

J Arrhythm 2020 Aug 6;36(4):777-779. Epub 2020 Jul 6.

Department of Cardiology Tokyo Metropolitan Hiroo Hospital Tokyo Japan.

A 17-year-old woman presented with frequent palpitations and shortness of breath and was diagnosed with drug-refractory ventricular parasystole. We predicted that the parasystole originated from the left anterior fascicle (LAF). Detailed activation maps of both conduction systems, including the LAF, during sinus rhythm and ventricular parasystole were obtained using a parallel mapping system. We confirmed the earliest fascicular potential of the parasystole and performed catheter ablation with no complications. This novel mapping algorithm for simultaneous acquisition of multiple maps aided effective treatment of ventricular parasystole originating from the LAF.
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http://dx.doi.org/10.1002/joa3.12400DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7411214PMC
August 2020

Recurrent ischemic stroke in patients with atrial fibrillation ablation and prior stroke: A study based on etiological classification.

J Arrhythm 2020 Feb 3;36(1):95-104. Epub 2019 Dec 3.

Tokyo Medical and Dental University Tokyo Japan.

Background: Different subtypes of ischemic stroke may have different risk factors, clinical features, and prognoses. This study investigated the incidence and mode of stroke recurrence in patients with a history of stroke who underwent atrial fibrillation (AF) ablation.

Methods: Of 825 patients who underwent AF ablation from 2006 to 2016, 77 patients (9.3%, median age 69 years) with a prior ischemic stroke were identified. Patients were classified as those with prior cardioembolic (CE) stroke (n = 55) and those with prior non-CE stroke (n = 22). The incidence and pattern of stroke recurrence were investigated.

Results: The incidence of asymptomatic AF (54.5% vs 22.7%;  = .011) and left atrial volume (135.8 mL vs 109.3 mL;  = .024) was greater in the CE group than in the non-CE group. Anticoagulation treatment was discontinued at an average of 28.1 months following the initial ablation in 34 (44.2%) patients. None of the patients developed CE stroke during a median 4.1-year follow-up. In the non-CE group, 2 patients experienced recurrent non-CE stroke (lacunar infarction in 1 and atherosclerotic stroke in 1); however, AF was not observed at the onset of recurrent ischemic stroke.

Conclusions: In patients with a history of stroke who underwent catheter ablation for AF, the incidence of recurrent stroke was 0.54/100 patient-years. The previous stroke in these patients may not have been due to AF in some cases; therefore, a large-scale prospective study is warranted to identify the appro priate antithrombotic therapy for the prevention of potentially recurrent stroke.
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http://dx.doi.org/10.1002/joa3.12285DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7011801PMC
February 2020