Regarding upper GI bleed-true statement is
Most common cause is variceal bleeding
It is bleeding up to ampulla of Vater
MC management is endoscopic banding
Rockall scoring is used for risk stratification
Ref. Sabiston Textbook of Surgery. Pg. 1142
 
GI Bleeding
Most common cause of GI Bleed is Non variceal bleeding (80%)

Upper GI bleed is defined bleeding arising from esophagus ,stomach ,or duodenum .
Rockall and Baylor scoring for predicatabilty of rebleeding and mortality
1st line management includes IV Fluids + blood (1:3) + PPI Infusion + upper GI endoscopy .