Dear friend,
It is sruprising that you can opt for echo but you dont have anaesthesia machine ( i suppose as you have mentioned you dont have good set-up). 2.5 ml in cardiac patient is too much. you could have used less amount with addition of tidigesic, morphine or fentanyl if you have.
Continuous spinal or epidural would have been ideal choice, i have used continuous spinal in such cases my self, without complications.
It is sruprising that you can opt for echo but you dont have anaesthesia machine ( i suppose as you have mentioned you dont have good set-up). 2.5 ml in cardiac patient is too much. you could have used less amount with addition of tidigesic, morphine or fentanyl if you have.
Continuous spinal or epidural would have been ideal choice, i have used continuous spinal in such cases my self, without complications.