Dobutamine-assisted exclusion of left atrial appendage thrombus in atrial fibrillation patients with sludge. - Minami K; Machino-Ohtsuka T; Yamasaki H; Mathis BJ; Yamada Y; Kawamatsu N; Sato K; Yamamoto M; Ishizu T (American heart journal plus : cardiology research and practice, 2026)