Hypertension is a common disease whose cardiac complications are very important sources of morbidity and mortality. These complications were detected by xray, electra car diography and echo cardiogeaphy. We have 248 patients in our study: 140 male and 108 female whose ages range between 34 and 80. Our study shows that the common cardiac compliations are: disorder of diastolic function (71%). Diloted cardio my opathy25.8%. Hy pertrophic cordiomiopathy.43.5%. arrhythamias (29.8%). coronary arteries disease 22.6%. Studying the relationship between cardiac complications and treatment shows that the regular and sufficient treatment seduces the cardiac compilation of hyprtension.