{"batchcode": "031M20A 044A21A", "histograms": [{"histogram": {"Aortic valve incompetence": 1, "Aortic valve replacement": 1, "Blood pressure decreased": 1, "Cardiac operation": 1, "Condition aggravated": 1, "Dyspnoea": 1}, "batchcodes": ["031M20A 044A21A"]}]}