When David heard that Nabal was dead, he said, Blessed be Yahweh, who has pleaded the cause of my reproach from the hand of Nabal, and has kept back his servant from evil: and the evil-doing of Nabal has Yahweh returned on his own head. David sent and spoke concerning Abigail, to take her to him as wife.
He was so angry and so upset in what she did, he just froze. His heart died within him, and actually he probably had a heart attack.