You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Consider the following modalities of treatment 1. Balloon dilatation 2. Heller&;s operation 3. Local injection of botulinum toxin Which of the above is/are the treatment modalities for achalasia cardia? and explain in detail?
<p>Davidson&;s principles and practice of medicine 22nd edition. *endoscopically directed injection of botulinum toxin into the lower oesophageal sphincter induces clinical remission but relapse is common. *Surgical myotomy or Heller&;s operation performed eitheeither laproscopically or as an open operation is effective. *Balloon catheter dialatatin improves symptoms in 80% cases</p>