Heart and blood vessel diseases have a great public health significance. Leading causes are mortality, pobol and disability, especially in elderly people. About 50% of premature mortality and disability can be prevented by adopting healthy life habits and timely detection of the diseases. In General Hospital Zadar invasive cardiology examination tests are performed by coronary and electrophysiological examination of the heart. This study work describes the electrostimulation of the heart and the RF ablation that are supplemented by these tests. Purpose of the study: The goal of the study is to describe the method of taking care of patient afterthe invasive cardiologic examination tests, ie coronarography, electrophysiology and also the implantation of the electrostimulator in General Hospital Zadar. Also, the aim of the study is to present the representation of coronarography, installation of electrostimulators and performed ablation that are carried out in period from 2015 until year 2017 in the General Hospital Zadar. Reference materials and methods: This study research is a retrospective data analysis based on the BIS system report of the General Hospital Zadar. Examined are patient that are hospitalized and treated in the cardiology laboratory of the General Hospital Zadar in the period from 1st of January 2015 until 31st of December 2017. Conclusion: In order to improve the diagnostic procedures from the nursing point of view, there is a need for continuous improvement and education. The healthcare care of patient is carried out from the patient's admission to the hospital, through his preparation for diagnostic examination, to conducting the examination, taking care of patient after diagnostic procedure, until patient discharge from hospital. Satisfying the basic human needs of the patient significantly impacts the outcome and quality of the performed diagnostic tests.