Brian May, 74, has revealed his heart attack led to him suffering from “a lot of other complications” to his health.The musician first told fans about his “small” heart attack in May last year, speaking about the situation in a video he posted on Instagram.Despite recovering from the heart attack, Brian has now revealed he had to “fight” his way back to being in good health.The star admitted: “What also happened was I got very sick. “I got a heart attack for no reason I can possibly see. “I didn’t really tick any of the boxes for heart attacks but I got it.”Brian added to the PA news agency: “That knocks you back, I have to say. “It knocks the stuffing out of you.