Pre- and post-procedural hemodynamic changes which could affect adverse outcomes in aortic stenosis (AS) patients who undergo transcatheter aortic valve replacement (TAVR) have not been well investigated.
They sought to examine the changes in blood flow dynamics of patients with severe AS who underwent TAVR.
The result that in severe AS patients undergoing TAVR, 4D flow CMR demonstrates that TAVR improves blood flow dynamics, especially when a larger effective orifice area index is obtained.

Hirokazu Komoriyama, Kiwamu Kamiya, Toshiyuki Nagai, Noriko Oyama-Manabe, Satonori Tsuneta, Yuta Kobayashi, Yoshiya Kato, Miwa Sarashina, Kazunori Omote, Takao Konishi, Takuma Sato, Shingo Tsujinaga, Hiroyuki Iwano, Yasushige Shingu, Satoru Wakasa & Toshihisa Anzai , "Blood flow dynamics with four-dimensional flow cardiovascular magnetic resonance in patients with aortic stenosis before and after transcatheter aortic valve replacement", Journal of Cardiovascular Magnetic Resonance, Published Online (2021) .