Table 1

Details of cohort showing the initial presentations of 37 cardiology inpatients with presentations of unknown aetiology, their discharge diagnoses after inpatient assessment according to the CIDG registry coordinators, and whether a family history was used by the cardiology inpatient team or the CIDG registry coordinators to determine whether patients were potentially affected by a CID

Patient	Age	Clinical presentation	Final diagnosis	Familial condition identified by cardiology team	Familial condition identified by coordinators
1	15	RSCD	LQTS	N	N
2	39	Syncope	Atrioventricular block	N	N
3	58	RSCD	DCM	N	N
4	48	Dyspnoea	DCM	N	N
5	26	Chest pain	Infiltrative cardiomyopathy	N	N
6	47	RSCD	Unknown	N	N
7	21	RSCD	Unknown	N	N
8	51	RSCD	Unknown	N	N
9	57	Chest pain	NSTEMI, known HCM	N	Y
10	64	RSCD	Other—viral myocarditis	N	N
11	58	Syncope	DCM	N	Y
12	72	RSCD	DCM	N	Y
13	66	Chest pain	NSTEMI, obligate LQTS carrier*	N	Y
14	44	RSCD	Unknown	N	N
15	57	Chest pain	ARVC	N	N
16	49	Presyncope	BrS	N	N
17	62	Dyspnoea	DCM	N	Y
18	58	Dyspnoea	DCM	N	N
19	62	Dyspnoea, known DCM	DCM	N	N
20	60	Dyspnoea, known DCM	DCM	N	Y
21	49	VT	DCM	N	N
22	20	Abdominal pain	DCM	N	Y
23	62	Dyspnoea	DCM	N	Y
24	20	RSCD	DCM	N	N
25	68	Heart failure	DCM	N	N
26	70	Presyncope	DCM	N	N
27	43	Dyspnoea	DCM	N	Y
28	54	Dyspnoea	DCM	N	N
29	50	VT	DCM	N	N
30	25	RSCD	Other—electrocution	N	N
31	19	RSCD	HCM	N	N
32	79	Heart failure	HCM	N	N
33	48	RSCD	LVNC	N	Y
34	55	RSCD	Unknown	N	N
35	34	RSCD	Unknown	N	N
36	45	Chest pain	HCM	N	Y
37	57	Dyspnoea	HCM	N	Y

*This patient was diagnosed with a NSTEMI, the cardiology inpatient assessment included FHx documenting ‘LQTS’; however, FHx obtained by coordinator revealed he was an obligate LQTS carrier.
ARVC, arrhythmogenic right ventricular cardiomyopathy; BrS, Brugada syndrome; CID, cardiac-inherited disease; CIDG, Cardiac Inherited Disease Group; DCM, dilated cardiomyopathy; FHx, family history; HCM, hypertrophic cardiomyopathy; LQTS, long QT syndrome; LVNC, left ventricular non-compaction; NSTEMI, non-ST elevation myocardial infarction; RSCD, resuscitated sudden cardiac death; VT, ventricular tachycardia.