(1) Background: So far, research results have confirmed the relationship between heat and cold stress, the fluctuations in atmospheric pressure and high relative humidity, and the vulnerability of patients with so-called “weather-dependent” diseases which could lead to death. This study aimed to determine the meteorological parameters, their interactions, and the seasonal changes of the most significant factors in predicting the number of patients reporting to the Emergency Departments (EDs) in Poznań (Poland) during 2019. (2) Methods: The analysis included the meteorological parameters and data of 3606 patients diagnosed with essential or complicated arterial hypertension, myocardial infarction, chronic ischemic heart disease, and ischemic or unspecified stroke by the International Classification of Diseases (ICD-10). The meteorological data (days per week and seasonal data) were used to build a linear regression model to assess the changes in the daily number of reporting patients. The input data for the final model were selected based on the principal component analysis (PCA), and built for each delay and acceleration (reporting up to 3 days before the change or up to 3 days after the change of the meteorological parameter). (3) Results: A significantly lower number of reports was observed during weekends compared to working days (standardised b = −0.254, p-value < 0.0001) and three days before the maximum daily air temperature in the spring and summer period (standardised b = −0.748, p-value < 0.0001), while two days after the increase in the daily amplitude of atmospheric pressure (standardised b = 0.116, p-value = 0.0267), and also on the day of occurrence of the unfavourable interdiurnal air temperature change, an increase in the number of patients was noted (standardised b = 0.115, p-value = 0.0186). The changes in the last two parameters were statistically insignificant. Based on the obtained results, the negative impact of the changes in the meteorological conditions on the number of reports to the EDs in Poznań was determined.

Background. In the years 2020 and 2021, the COVID-19 pandemic disrupted Poland’s health care system and caused a high number of excess deaths. After nearly 30 years of continuous dynamic increase in the life expectancy of the Polish population and a decrease in premature mortality that led to a reduction in the health gap between Poland and Western European countries, regrettably, a decline in life expectancy was recorded. For males, the decline amounted to 2.3 years and, for females, to 2.1 years. Aim. The aim of this study was to assess changes in the level of premature mortality due to selected cardiovascular diseases in Poland before and during the COVID-19 pandemic. Method. Time trends of deaths of patients under the age of 65 due to ischemic heart disease, cerebrovascular disease and aortic aneurysm were analyzed by gender and age groups. The joinpoint model was used in determining time trends. Results. Premature mortality due to all of the cardiovascular diseases analyzed had been declining steadily by about 5% per year since 2008. However, at the end of the second decade of the 21st century, a significant change in the dynamics of the trend was observed, particularly with regard to deaths from ischemic heart disease, which since 2018 caused premature mortality increases of 10% per year in the female population. In the male population, an increase of nearly 20% per year has been observed since 2019. The changes also affected premature mortality due to cerebrovascular disease. Conclusions. After nearly three decades of significant decline in premature mortality from cardiovascular diseases in Poland, there was a reversal in the trend, in particular as regards ischemic heart disease. The unfavorable changes intensified in the subsequent two years. The simultaneous increase in the number of cardiovascular incidents ending in death and the decline in access to prompt diagnosis and effective treatment may explain the unfavorable changes in the deaths caused by cardiovascular disease and the increase in premature mortality due to cardiovascular disease.