Question
A patient develops condition as shown in an ECG intra-operatively.The drug of choice in these cases is?
| A. |
Propanolol.
|
| B. |
Adrenaline.
|
| C. |
Hyoscine.
|
| D. |
Neostigmine.
|
Show Answer
|
Correct Answer � A
Explanation
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|
Ans:A.)Propanolol.
The ECG represents Intraoperative Sinus tachycardia.
Sinus Tachycardia.
- It is defined as an increase in the sinus rate of more than 100 beats/minute. Prolonged tachycardia for long duration can induce ischaemia in coronary artery diseased patients.
- Causes: It includes
- Anaemia because of blood loss
- Pain
- Inadequate anaesthesia
- Hypovolaemia
- Fever
- Hypercarbia
- Thyrotoxicosis/ thyroid crisis
- Cardiac failure with compensatory sinus tachycardia
- Catecholamines excess
- Treatment: Before instituting pharmacological treatment for sinus tachycardia, precipitating factors must be identified and corrected.
- Drug therapy is especially required in patients with ischaemic heart disease who develop ST segment changes to prevent further myocardial ischaemia.
- Beta-blockers such as esmolol is preferred drug for managing it.
- If continuous use is required, it may be replaced by longer lasting cardio selective drugs such as metoprolol .Another drug can be used is propranolol
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