Insulin resistance (IR), a core component in the development of type 2 diabetes mellitus (T2DM), is increasingly recognized for its role in cardiovascular and pulmonary complications. This review explores the relationship between IR, right ventricular dysfunction (RVD), and decreased lung volume in patients with T2DM. Emerging evidence suggests that IR contributes to early structural and functional alterations in the right ventricle, independent of overt cardiovascular disease. The mechanisms involved include oxidative stress, inflammation, dyslipidemia, and obesity—factors commonly found in metabolic syndrome and T2DM. These pathophysiological changes compromise right ventricular contractility, leading to reduced pulmonary perfusion and respiratory capacity. RVD has been associated with chronic lung disease, pulmonary hypertension, and obstructive sleep apnea, all of which are prevalent in the diabetic population. As RVD progresses, it can result in impaired gas exchange, interstitial pulmonary edema, and exercise intolerance—highlighting the importance of early recognition and management. Therapeutic strategies should aim to improve insulin sensitivity and cardiac function through lifestyle interventions, pharmacological agents such as SGLT2 inhibitors and GLP-1/GIP analogs, and routine cardiac monitoring. These approaches may help slow the progression of RVD and its respiratory consequences. Considering the global burden of diabetes and obesity, and the growing incidence of related complications, further research is warranted to clarify the mechanisms linking IR, RVD, and respiratory dysfunction. Understanding this triad will be crucial for developing targeted interventions that improve outcomes and quality of life in affected patients.

Background: Despite a decline observed in smoking rates amongst adults in many high-income countries, tobacco usage among adolescents remains a significant concern, particularly in Central and Eastern Europe, Romania being no exception. This cross-sectional study aims to assess the prevalence of smoking among teenagers enrolled in several public schools in Bucharest and the surrounding county, Ilfov, while also exploring their attitudes, perceptions, and experiences regarding tobacco. Methods: A public health campaign, conducted in collaboration with multiple institutions between September 2023 and March 2024, sought to provide secondary school students with updated information on smoking and its implications through presentations at schools. Following these presentations, students voluntarily completed anonymous on-paper questionnaires consisting of 10 multiple-choice questions designed to gauge their knowledge and attitudes towards smoking, conceptually inspired by internationally validated instruments such as the Global Youth Tobacco Survey. Results: A total of 945 teenagers participated in our study, with a median age of 13.04 years (standard deviation of ±1.08). Results indicate that 22.85% (n = 216) of teenagers had attempted smoking at the time of the investigation. Additionally, 57.88% (n = 547) of respondents reported exposure to second-hand smoke at home, and 40.42% (n = 382) had been invited to smoke previously. Conclusions: Various factors influence smoking behaviors among teenagers, with peer pressure and familial background playing significant roles in shaping their attitudes toward smoking. Our study highlights the vulnerability of the young Romanian population to these influences, emphasizing the need for initiatives aimed at mitigating tobacco use and fostering a healthier future environment. Nonetheless, these findings shall serve as an instrument for the development of school-based prevention programs and stricter tobacco usage policies.