Table 2

Seven probands with very rare variants identified (<0.02% in NHLBI and UCL-exomes cohorts)

Age at death/sexCircumstance of death (post-mortem findings)Gene and disease associatedAmino acid changeFrequency in UCL-ex exomes (2867 individuals)Frequency in NHLBI exome sequencing (6500 exomes)Frequency in ExAC dataset (60 706 exomes)Familial clinical evaluation
4 years/femaleSleep (normal heart)*SCN5A
LQT6,7
R1623Q000Parents and siblings no LQT/BrS phenotype.
All R1623Q negative
6 years/maleSleep (RV fat infiltration with no fibrosis)*SCN5A
LQT8–10
V411M000Parents and siblings no LQT/BrS phenotype.
All V411M negative
18 years/femaleDaily activities (normal heart)*TTN
DCM/HCM
E23106XUndetermined00.00083Family declined screening
26 years/femalePhone call (normal heart)*RyR2
CPVT11
N1551S000.034Parents and siblings no CPVT phenotype but mother and sister positive N1551S and 4 sudden deaths on maternal side
32 years/maleSleep (normal heart)*GJA5
Familial AF
Y197X000Family declined screening
39 years/maleDaily activities (fat infiltration both RV and LV, but no fibrosis)*MYOT
LGMD
Q453X000.00165Family declined screening
44 years/maleDaily activities (mild fibrosis with no disarray)*DSC2
ARVC12
S868F00.00770.0058Young child normal ECG and echo
Age at death/sexCircumstance of death (post-mortem findings)Gene and disease associatedAmino acid changeFrequency in UCL-ex exomes (2867 individuals)Frequency in NHLBI exome sequencing (6500 exomes)Frequency in ExAC dataset (60 706 exomes)Familial clinical evaluation
4 years/femaleSleep (normal heart)*SCN5A
LQT6,7
R1623Q000Parents and siblings no LQT/BrS phenotype.
All R1623Q negative
6 years/maleSleep (RV fat infiltration with no fibrosis)*SCN5A
LQT8–10
V411M000Parents and siblings no LQT/BrS phenotype.
All V411M negative
18 years/femaleDaily activities (normal heart)*TTN
DCM/HCM
E23106XUndetermined00.00083Family declined screening
26 years/femalePhone call (normal heart)*RyR2
CPVT11
N1551S000.034Parents and siblings no CPVT phenotype but mother and sister positive N1551S and 4 sudden deaths on maternal side
32 years/maleSleep (normal heart)*GJA5
Familial AF
Y197X000Family declined screening
39 years/maleDaily activities (fat infiltration both RV and LV, but no fibrosis)*MYOT
LGMD
Q453X000.00165Family declined screening
44 years/maleDaily activities (mild fibrosis with no disarray)*DSC2
ARVC12
S868F00.00770.0058Young child normal ECG and echo

All variant frequencies are listed as percentages. Expert cardiac pathology review denoted with an asterisk.

Table 2

Seven probands with very rare variants identified (<0.02% in NHLBI and UCL-exomes cohorts)

Age at death/sexCircumstance of death (post-mortem findings)Gene and disease associatedAmino acid changeFrequency in UCL-ex exomes (2867 individuals)Frequency in NHLBI exome sequencing (6500 exomes)Frequency in ExAC dataset (60 706 exomes)Familial clinical evaluation
4 years/femaleSleep (normal heart)*SCN5A
LQT6,7
R1623Q000Parents and siblings no LQT/BrS phenotype.
All R1623Q negative
6 years/maleSleep (RV fat infiltration with no fibrosis)*SCN5A
LQT8–10
V411M000Parents and siblings no LQT/BrS phenotype.
All V411M negative
18 years/femaleDaily activities (normal heart)*TTN
DCM/HCM
E23106XUndetermined00.00083Family declined screening
26 years/femalePhone call (normal heart)*RyR2
CPVT11
N1551S000.034Parents and siblings no CPVT phenotype but mother and sister positive N1551S and 4 sudden deaths on maternal side
32 years/maleSleep (normal heart)*GJA5
Familial AF
Y197X000Family declined screening
39 years/maleDaily activities (fat infiltration both RV and LV, but no fibrosis)*MYOT
LGMD
Q453X000.00165Family declined screening
44 years/maleDaily activities (mild fibrosis with no disarray)*DSC2
ARVC12
S868F00.00770.0058Young child normal ECG and echo
Age at death/sexCircumstance of death (post-mortem findings)Gene and disease associatedAmino acid changeFrequency in UCL-ex exomes (2867 individuals)Frequency in NHLBI exome sequencing (6500 exomes)Frequency in ExAC dataset (60 706 exomes)Familial clinical evaluation
4 years/femaleSleep (normal heart)*SCN5A
LQT6,7
R1623Q000Parents and siblings no LQT/BrS phenotype.
All R1623Q negative
6 years/maleSleep (RV fat infiltration with no fibrosis)*SCN5A
LQT8–10
V411M000Parents and siblings no LQT/BrS phenotype.
All V411M negative
18 years/femaleDaily activities (normal heart)*TTN
DCM/HCM
E23106XUndetermined00.00083Family declined screening
26 years/femalePhone call (normal heart)*RyR2
CPVT11
N1551S000.034Parents and siblings no CPVT phenotype but mother and sister positive N1551S and 4 sudden deaths on maternal side
32 years/maleSleep (normal heart)*GJA5
Familial AF
Y197X000Family declined screening
39 years/maleDaily activities (fat infiltration both RV and LV, but no fibrosis)*MYOT
LGMD
Q453X000.00165Family declined screening
44 years/maleDaily activities (mild fibrosis with no disarray)*DSC2
ARVC12
S868F00.00770.0058Young child normal ECG and echo

All variant frequencies are listed as percentages. Expert cardiac pathology review denoted with an asterisk.

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