Final answer:
The likely cause of this clinical picture is Rupture of the lower esophagus, specifically a Mallory-Weiss tear, which is commonly associated with heavy alcohol consumption and forceful vomiting.
Step-by-step explanation:
The likely cause of this clinical picture is Rupture of the lower esophagus. The presence of bright red blood in the vomitus suggests upper gastrointestinal bleeding, and the excessive retching and vomiting prior to the bleeding can lead to a rupture of the lower esophagus known as Mallory-Weiss tear. This tear is commonly associated with heavy alcohol consumption and forceful vomiting.