Match the Following.
| Column I | Column II |
| (a) Depolarisation of atria | (i) Increase cardiac output |
| (b) Repolarisation | (ii) Decrease cardiac |
| (c) Sympathetic nerve | (iii) P – wave |
| (d) Parasympathetic nerve | (iv) QRS complex |
| (e) Depolarisation of ventricles. | (v) T -wave. |