Table 2 Summary of cardiac events.

From: Long-term cardiac outcomes of patients with HER2-positive breast cancer treated in the adjuvant lapatinib and/or trastuzumab Treatment Optimization Trial

CEs, subtype and timing

All pts (4190) N (%)

T arm (2097) N (%)

T + L arm (2093) N (%)

Cardiac events

363 (8.6)

197 (9.3)

166 (7.9)

CE during anti-HER2 therapy

270 (6.4)

153 (7.2)

117 (5.6)

CE during follow-up phase

93 (2.2)

44 (2.1)

49 (2.3)

Asymptomatic CE

265 (6.3)

155 (7.4)

110 (5.3)

Symptomatic CE

94 (2.2)

40 (1.9)

54 (2.6)

Cardiac deaths

4 (<0.1)

2 (<0.1)

2 (<0.1)

Median time in months to develop a CE (range)

6.6 (3.4–11.7)

6.4 (3.6–11.7)

7.1 (2.9–16.6)