Hector Lavoe, a salsa music singer who was once nominated for a Grammy Award , died June 29 of a heart attack, his record company said. He was 46.Lavoe shared the stage with some of the top tropical music singers, notably Tito Puente, Celia Cruz and Ruben Blades. In 1988, he was nominated for a Grammy in the tropical music category for his record “Lavoe Strikes Back.” Other works included the albums “La Voz” (The Voice), “Fania All Stars at Yankee Stadium” and “Asalto Navideno” (Christmas Assault) with Willie Colon. Lavoe died at St. Clare’s Hospital. His health had deteriorated gradually since he survived a fall from the ninth floor of a hotel in San Juan, Puerto Rico, in 1988. Lavoe came to New York from Puerto Rico at 17. He is survived by his wife, Pucci.