In a prospective observation study of 601 patients with systemic sclerosis (SSc), the use of vasodilators (including calcium channel blockers, angiotensin-converting enzyme (ACE) inhibitors and/or angiotension II receptor blockers) was associated with a reduced incidence of ventricular arrhythmias (hazard ratio (HR) 0.28, 95% CI 0.09–0.90). In the same multi-variant Cox regression analysis, low-dose acetylsalicylic acid (ASA) (≤325 mg daily) was associated with a reduced incidence of cardiac blocks and/or Q waves and/or pacemaker implantation (HR 0.46, 95% CI 0.24–0.87).