Short run of SVT (Supra ventricular tachycardia) means an episode of extra beats in a row. If it comes very occasionally and there are no symptoms and there is no underlying heart disease, in the form of poor heart function etc. it does not need any specific measures. However, if there are longer episodes of palpitations with significant symptoms if there is underlying reduced function of the heart, it needs proper medication, evaluation and follow up.
Your diabetes and high blood pressure should be meticulously controlled.