Background:Sudden death is known as the abrupt, prolonged cessation of cardiac activity brought on by shock along with hemodynamic collapse. Aim:to evaluate patient outcomes and the grieving experiences of patients' families who had unexpected deaths in the intensive care unit (ICU). Design:a descriptive study.Setting:Emergency units at Assiut University hospitals. Subjects: 60 patientswho were admitted to ICU and suddenly arrested. Tool I: patients’ outcomes sheet:asked about patients’ demographics, assessment types of arrhythmias, respiratory assessment, diagnostic and laboratoryinvestigation, dyspnea grade and causes of sudden death.Tool II: Quality of Dying and Death Questionnaire (QODD): asked respondents to score the quality of the decedent's final seven days of life on 31 elements.Tool III: The CAESAR 15 question survey tool: The tool consisted of three domains: (I) communication issues; (II) family needs and (III) satisfaction.Results:Among the studied sudden death patients, 32 (53.3%) had acute myocardial infarction, 12 (20%) had pulmonary embolism, 8 (13.3%) had congestive heart failure and 8 other patients (13.3%) had acute left ventricular heart failure. The mean total score of the QODD questionnaire was 41.15 ± 17.94 which indicated mild to moderatedexperience qualityofrelatives. The total score of CAESAR 15 survey among the studied patients was 38.74 ± 14.98 which indicated mild to moderate comforting experience. Conclusion:The most common cause of sudden death is acute myocardial infarction, followed by pulmonary embolism, congestive heart failure and acute left ventricular heart failure.