Background continued:

• Premature beats are the second most common cause for palpitation. Sinus tachycardia is first.
• Although caffeine ingestion is often cited as a cause, there is little objective evidence to support this.
• It has been shown in one study that over seven cups of coffee per day does increase the incidence of VPBs by ambulatory monitoring.
• Cocaine and heavy alcohol intake, however, show a strong correlation with VPBs.