I have cardio issues , have 5 stents. Function quite normally. Recently become exhausted after only ordinary tasks...fixing dinner getting dressed and making the bed...sweeping or vacuuming for 20 30 minutes...general activities like that. This is recent. Within the last week or so. I just have to stop and sit down until I recover Any connection to cardio...other? Age 86. Generally still in good shape. I exercise on an irregular basis