Penny Lancaster has revealed that husband Rod Stewart was found to have an previously undiagnosed heart problem before doctors inserted a stent this summer
The singer, 81, is now recovering well and has returned to the gym, although his family, trainer and medical team are ensuring he does not overdo it
Stewart cancelled the rest of his US and Mexico shows, including a Las Vegas residency, after being advised to take four weeks off
His recent health troubles also included respiratory infections and a sinus problem, but Lancaster says he is steadily returning to everyday activities.