Emergent transcatheter aortic valve replacement in high risk patient without CTA analysis: a case report

• Hai-tao LIU, 
• Xiao-na CHEN, 
• Bo WANG, 
• Cun-jun ZHU, 
• Yun-yao LI, 
• Wei BAI, 
• Fang-jun MOU, 
• Hong-yu DU, 
• Fei LI, 
• Ling TAO