Introduction: Cardiac implantable electronic devices (CIED) such as pacemakers or car-dioverter defibrillators prevent dangerous heart arrhythmias and conduction abnormalities. Post-inter-vention education is crucial in the patient recovery process and aims to avoid both dangerous behavior and unnecessary restraints in daily living.
Objective: The evaluation of knowledge of daily activities’ safety among patients with CIEDs and an analysis of the relationship between the state of knowledge and perceived post-intervention quality of life.
Materials and Methods: The study group included 100 patients (57% men) with CIEDs, recruited in the University Hospital in Kraków. Data on the patients’ knowledge about permissible daily activities, medical procedures and perceived quality of life was collected using a dedicated questionnaire, which comprised 57 simple and multiple-choice questions.
Results: The analyzed group included patients aged 28 to 97 years (mean age 73). Among them, 26% either have not received or have not read the information booklet. Two-thirds of them either need more information about their device (51%) or do not possess essential knowledge (15%). Patients raised con-cerns about performing daily activities such as: car-driving (38%), using seat belts (14%), bathing (15%), returning to work (51%) or climbing stairs (16%). They reported anxiety when using computers (39%), mobile phones (51%), microwaves (73%) and even electric toothbrushes (51%). It has been observed that patients with a greater general understanding of the pacemaker and post-implantation restraints had a higher quality of life on average.
Conclusions: Patients with CIEDs restrain themselves excessively in daily living. There is a strong need to provide them with knowledge of their medical condition, concomitant capabilities, and limitations to undergo a fully successful rehabilitation. Comprehensive and easily comprehensible recommendations may play a key role in improving patients’ quality of life.

Introduction: Seasonal variation has been observed for bacterial and viral infections (e.g., COVID-19 [1]), but also for numerous cardiac problems. However, little information is available on the seasonality of infectious endocarditis (IE), a rare disease that is usually linked to a bacterial origin. Data from the Polish population are lacking.
Materials and Methods: Our retrospective study focused on the identification of patients with IE, who were hospitalized at the University Hospital in Krakow between 2005–2022. For this purpose, we searched the medical records system using the ICD-10 code. We decided to divide our patients into four groups (winter, spring, summer, autumn), based on the date of admission to the hospital. Comparison of the distribution of IE incidents by season was performed with the ch2 test.
Results: One hundred and ten patients were included in the study (median age 62.5 years (range 20–94), 72 men (65.45%)). The left native valve IE was diagnosed in 49% of the patients, the prosthetic valve IE in 16%, the right valve IE in 27% and the implantable cardiac electronic devices IE in 12% of the subjects. The outcomes comprised of cardiac surgery (n = 53), embolism (n = 16), death (n = 15) and metastatic infections (n = 5). No differences in the incidence of IE by season were observed.
Conclusions: In the preliminary observation of IE cases of patients admitted to the University Hospital in Krakow, Poland no seasonal pattern of IE was detected. Therefore, IE should be taken into account in the differential diagnosis at any time of the year.