Certain substances can contribute to an abnormal/irregular heartbeat, including: 1  Caffeine. 2  Tobacco. 3  Alcohol. 4  Cold and cough medications. 5  Appetite suppressants. 6  Psychotropic drugs (used to treat certain mental illnesses) 7  Antiarrhythmics (paradoxically, the same drugs used to treat arrhythmia can also cause arrhythmia.
Founded as an independent company in 1982, RSA Security, Inc. was acquired by EMC Corporation in 2006 for US$2.1 billion and operates as a division within EMC. RSA is based in Bedford, Massachusetts, with regional headquarters in Bracknell (UK) and Singapore, and numerous international offices.
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