Electrolytes in Chronic Kidney Disease Patients With Acute Coronary Syndrome

Inclusion Criteria: * 1-The CKD patients with or without dialysis who admitted to coronary care unit with chest pain consistent with ACS with any of following features : a- Electrocardiogram (ECG) changes: * ST elevation. * ST depression. * T wave inversion. * recent left bundle branch block. b- Troponin T elevation. 2-The CKD patient with or without dialysis with no previous history of ACS. Exclusion Criteria: 1. Patients who were diagnosed with primary hyperparathyroidism. 2. Acute Kidney injury (AKI) which is defined as any of the following:(KDIGO2012) * Increase in S.Cr by ≥ 0.3 mg/dl (≥ 26.5 μmol/l) within 48hours; or * Increase in S.Cr to ≥ 1.5 times baseline, which is known or presumed to have occurred within the prior 7 days;or * Urine volume \<0.5 ml/kg/h for 6 hours