Hello sir, my nearest is experiencing heart tightness some times when he walks for few steps, the patient is under oral chemotherapy, the tablet also says some side effects related to heart, 'Now patient' s ecg, echo reports are normal' bt while doing tmt after 2 mins of running patient experienced tightness so doctor suggested to do angiography to check if there's any blockage and patient is having single kidney and creatine is 1.2 so my question is can we wait for a month without doing angio,