The internist intensive care unit is a key part of the hospital system, providing advanced healthcare to patients with serious and life-threatening conditions. In this unit, patients with acute medical problems such as acute myocardial infarction, severe respiratory insufficiency, sepsis, renal insufficiency and other conditions that require continuous monitoring and complex therapeutic procedures are cared for. Health care in the ICU is multidisciplinary, it includes specialist doctors in the field of internal medicine, anesthesiology and other subspecialties. A key role in patient care is played by a team of nurses, who provide constant supervision, apply therapy and participate in the evaluation of the patient's condition. Their expertise in recognizing changes in the patient's health can significantly influence the outcome of treatment. Regular team meetings enable the exchange of information and decision-making based on the latest medical guidelines, the individual needs of patients, and thereby involve families in the care process itself, through information and counseling. Treatment includes the use of sophisticated diagnostic and therapeutic procedures. Monitoring of vital functions, use of mechanical ventilation, hemodialysis, infusion therapy and various invasive procedures, such as central venous catheters and arterial lines, and in addition, care extends to the prevention and treatment of complications such as infections, thromboembolism, and pressure ulcers. Given the complexity of the conditions treated in the ICU, ethical issues often come to the fore. Decisions about continuing or stopping intensive treatment, quality of life issues and communication with patients' families require careful consideration and professional guidance. The internist's intensive care unit is the heart of hospital care for the most critically ill patients, where advanced medical technology and the expertise of medical staff come together to provide optimal care and maximize the prospect of recovery.