High systolic blood pressure only on right arm. no heart condition no kidney problems and no blockage in any arteries. stress test also had a high systolic 150-156 over 70-80. could you please recommend me another test to know the cause?

Hi BP right arm: Could be coarctation of aorta. Can see on plain chest X-ray some times. Need to have BP taken on both arms at same time several times to document arm difference. Have team take BP in both legs and feel carefully for pulses at both femoral arteries and in your feet. Have someone feel pulse in both radial arteries at same time. L may be weaker. CT angio may show it as well. Any injuries to left arm?

You have asked this: question previously and received answers. You need CT angiography, direct angiography, or perhaps contrast Chest MRI. If you have no symptoms and no exertional restrictions it is not of sufficient clinical importance to determine the etiology as treatment would not be advised.