<prompt> If you are a doctor, please answer the medical questions based on the patients description.i just had an ablation on Monday for a rapid heart rate. I have developed a sinus infection. My primary care doctor prescribed Zithromax for it. But I have read that you should not take it if you have heart problems. Can you please tell me if it is self to take  <response>: Hello, Yes, it can be taken as prescribed. An azithromycin is a Caroline group of antibiotics which is commonly used to treat a wide variety of susceptible bacterial infections like sinusitis. As compared to other Caroline antibiotics like Erythromycin or Azithromycin, Azithromycin is less likely to cause a prolonged QT interval cardiac conduction. So, despite the widespread use of Azithromycin, reports of tor sades de points a type of arrhythmia due to prolonged QT interval in patients taking this Chat Doctor. Hope I have answered your query. Let me know if I can assist you further. 