I see no relation with aortic valve replacement
and atrial septal defect
closure done 11 year ago with hypertension
and sonographic findings of kidneys. You ought to be investigated as a case of Hypertension, signs of target organ damage (kidney, heart, brain) as well as other risk factors for coronary artery
disease. Blood pressure of 140/100 is silent but serious potential problem needs non pharmacological measures like healthy life style, balanced low fat and low salt diet, exercise and possibly a drug. There is no drug of choice rather there is choice of drugs and your doctor is the best person to choose which drug ought to be used in you. You need investigations for diabetes
and microscopic examination of urine as a must. There is cause of concern not of worry at the moment.
With Best Wishes
Dr Anil Grover