###Human: Is it normal to have high pulse rate without breathlessness after a brisk walk? ###Assistant: Hello. Yes, if your heart rate is going above 150 without any chest pain or heaviness then the probability of significant blockages (more than 60 to 70 percent) is very low. However, this or even TMT will not help to rule out plaquing. TMT does not help in the diagnosis or ruling out plaquing as blood supply to the heart is not decreased even at very high heart rate. For plaques, CT coronary angiography is a good investigation. Although not absolutely necessary in you, you may undergo screening CT angiography or TMT in a few years just be on safer side considering the risk factors. Rest continue with a healthy lifestyle and medicines.