Im a 21 year old male. I was recently diagnosed with innapropriate sinus tachycardia. My first question is, is this really a good diagnoses for me? My resting heart rate is very normal. Around 60 high 50s. It’s only with exertion that my tachycardia comes into play and something as simple as taking a shower gets me up to 150bpm. From what I’ve read people with IST have my symptoms, ASWELL as a resting heart rate usually >100. After my diagnoses day before yesterday I was put on the beta blocker atenolol. My concern with this is its lowering my heart rate with exertion and at rest. Now my resting heart rate is high in the 40s. The reason this concerns me is my second question. I am also prescribed the benzodiazapine klonopin for anxiety. This also lowers my heart rate. I haven’t taken it due to fear of too low of a heart rate. Is it safe to take with a pulse already so low from the beta blocker alone? A bp in the 40s then a nocturnal dip could spell disaster potentially. Thanks.