Masaki Izumo, MD, PhD

Atrioventricular block is a common complication of transcatheter aortic valve implantation (TAVI). Although conventional transvenous dual-chamber pacemaker (PM) is ideal for atrioventricular block, leadless PM is less invasive and may be...

Atrioventricular block is a...

09/30/2020

Journal of Invasive Cardiology

Clinical Images

“Avulsion Injury” of the Artery by a Suture-Mediated Closure System During Transcatheter Aortic Valve Implantation

06/30/2020

Masaki Izumo , MD, PhD;

Kazuaki Okuyama , MD;

Toshiki Kaihara , MD, PhD;

Mika Watanabe , MD;

Masashi Koga , MD;

Ryo Kamijima , MD, PhD;

Yasuhiro Tanabe , MD, PhD;

Yuki Ishibashi , MD, PhD;

Takumi Higuma , MD, PhD;

Yoshihiro J. Akashi , MD, PhD;

Shingo Kuwata , MD, PhD;

We describe a cut-down method that is useful in cases with calcification restricted to the region surrounding the puncture site in transcatheter aortic valve implantation patients with severe aortic stenosis.

We describe a cut-down method...

06/30/2020

Journal of Invasive Cardiology

(A) Angioscopic system evaluating surface of the atrial septal occluder (ASO): low-molecular-weight dextran is infused from the guiding catheter and the tip of the GuideLiner extension catheter during observation. (B) Neointima covering most of the 22 mm ASO 6 months post implantation. (C) Around the central part of the device, the struts were exposed with marked thrombus formation. Guidewire marked by asterisks (*) in panels B and C.

Endothelialization of an Amplatzer Septal Occluder Device 6 Months Post Implantation: Is This Enough Time? An In Vivo Angioscopic Assessment

01/28/2019

Yoshihiro J. Akashi , MD, PhD;

Yukio Sato , MD, PhD;

Masaki Izumo , MD, PhD;

Tomoo Harada , MD, PhD;

Yasuhiro Tanabe , MD, PhD;

Yuki Ishibashi , MD, PhD;

Takumi Higuma , MD, PhD;

This report evaluates endothelialization in vivo and demonstrates that 6 months of postimplantation prophylactic therapy may not provide sufficient time for adequate endothelialization.

This report evaluates...

01/28/2019

Journal of Invasive Cardiology