An 87-year-old woman is seen by the GP due to palpitations and chest pain.
| DATE | DRUG NAME | DOSE | ROUTE | FREQUENCY | Prescriber’s Signature |
| 10/1/21 | AMLODIPINE | 10MG | ORAL | ONCE DAILY | DR |
| 10/1/21 | LISINOPRIL | 10MG | ORAL | ONCE DAILY | DR |
| 10/1/21 | SALBUTAMOL | 200MCG | INHALE | PRN | DR |
| 10/1/21 | SERTRALINE | 50MG | ORAL | ONCE DAILY | DR |
| 10/1/21 | ASPIRIN | 75 MG | ORAL | ONCE DAILY | DR |
An 87-year-old woman is seen by the GP due to palpitations and chest pain. Her vitals are: heart rate 85 beats per minute, blood pressure 120/75mmHg, SpO2 96% on RA. A blood test is taken with results: WCC 3.9, RBC 4.4, Hb 14, BUN 25, Creatinine 1.5, Na 130, K 6.0, eGFR 75.
An ECG is carried out.

Her medications are as follows:
Which of her medications is the most likely cause of these investigation findings?
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