What are the early signs and symptoms of kidney stones? If the thrombus breaks off embolizes and flows towards the lungs, it can become a pulmonary embolism PE , a blood clot in the lungs. Evidence supports the use of heparin in people following surgery who have a high risk of thrombosis to reduce the risk of DVTs; however, the effect on PEs or overall mortality is not known. Hypertensive heart disease Hypertensive emergency Hypertensive nephropathy Essential hypertension Secondary hypertension Renovascular hypertension Benign hypertension Pulmonary hypertension Systolic hypertension White coat hypertension. The most common type of kidney stone contains calcium in combination with either oxalate or phosphate. Quick Guide Kidney Stones: Variations that may increase surgical risk include the presence of giant aneurysms and a right coronary artery-to-left ventricle fistula.