Table 2.

Distribution of top 10 keywords in our bibliometric analysis from the perspectives of information systems, big data, and knowledge discovery.

Perspective	Keywords	Occurrence	Total link strength
(A) Information systems	Administrative data	18	82
	ICD-10	26	77
	Mortality	18	72
	Validation	12	67
	Care	15	66
	Classification	20	56
	Complications	10	52
	Quality	9	50
	Accuracy	9	47
	ICD-9-CM	10	47
(B) Big data	Big data	8	14
	Care	6	13
	ICD	5	13
	Big cities	4	10
	Mortality	5	10
	Racial disparities	4	10
	Survival	3	10
	Follow-up	3	9
	Health	3	9
	Breast cancer	3	8
(C) Knowledge discovery	Implantable cardioverter-defibrillator	4	12
	Quality of life	4	12
	Care	4	9
	Classification	8	9
	ICD	6	9
	Knowledge	4	8
	Management	4	8
	Anxiety	6	7
	Sudden cardiac death	4	7
	Diagnosis	4	6