After staing your patient on imipramine, his hea rate rises to 120/min and he has blurred vision. These effects can be explained by the fact imipramine:
High-Yield Explanation
(Ref: KDT 6/e p444) These symptoms are of anticholinergic drugs. Tricyclic antidepressants have powerful anticholinergic propeies and can lead to these symptoms.