As temperatures drop, the body responds by narrowing blood vessels and increasing sympathetic nervous activity, which shows up on ECG as changes in heart rate and rhythm. This article would break down those effects in simple terms, demystifying why cardiologists sometimes see more abnormalities in ECGs during winter. It also gives practical heart protection tips suitable for all readers. https://sunfox.in/blogs/how-does-cold-weather-affects-your-heart/