I've recently had an ECG done, and it mentioned something called sinus arrhythmia. Just wondering, is this a big deal? Should I be making an appointment with a cardiologist to get it checked out further?

ECG report showing sinus arrhythmia is usually not a cause for concern, especially if you are not experiencing any symptoms. Sinus arrhythmia is a normal variation in heart rate that occurs with breathing. However, if you have any underlying heart conditions or if you are experiencing symptoms such as dizziness, chest pain, or shortness of breath, it is advisable to consult a Cardiologist for further evaluation and management. No specific medication is required for sinus arrhythmia.