You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Disease", "Chemical"].

Please return the output as a JSON object of the format: {"Chemical" : ["Naloxone", ...], "Disease" : ["Hypotensive", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Time course alterations of QTC interval due to hypaque 76. Sequential measurement of QT interval during left ventricular angiography was made 30 seconds and one, three, five and ten minutes after injection of hypaque 76. The subjects were ten patients found to have normal left ventricles and coronary arteries. Significant QTC prolongation occurred in 30 seconds to one minute in association with marked hypotension and elevation of cardiac output.
{"Chemical": ["hypaque 76"], "Disease": ["hypotension", "QTC prolongation"]}