ABC | Volume 114, Nº2, February 2020

Original Article Lacerda et al. Mortality in cardioinhibitory carotid sinus hypersensitivity Arq Bras Cardiol. 2020; 114(2):245-253 Figure 1 – Study design and results. CSM: Carotid sinus massage; CICSH: cardioinhibitory carotid sinus hypersensitivity. 1686 patients ≥ 50 years referred to 12-lead ECG 562 randomly selected 60 were excluded • 26 refused to consent • 31 had contraindication to CSM • 3 carried permanent pacemakers 502 patients underwent CSM 450 without CICSH 42 patient lost to follow-up 408 patients 52 patients identified with asystole ≥ 3s CICSH prevalence: 10.4% 102 patients actively followed, 1 has been submited to pacemeker implantation 27 patients actively followed, None have been submited to pacemaker implantation 306 patients with information found at Rio de Janeiro State databank. None submited to pacing 25 patients with information found at Rio de Janeiro State datebank. None submited to pacing 75 alive at the end of follow up. 19 alive at the end of follow up. 04 alive at the end of follow up. 27 died 21 died 8 died 174 died 132 alive at the end of follow up. 201/408 patients died (49.3%) 29/52 patients died (55.8%) Figure 2 – Duration of the longest RR interval observed during right and left carotid sinus massage. Boxplots on the left of each square represent patients who died during follow-up. Boxplots on the right represent patients who were alive at the end of the study. Right carotid sinus massage Left carotid sinus massage Duration of ventricular pauses in seconds 10 8 6 4 3 2 0 10 8 6 4 3 2 0 Died Alive Died Alive p = 0.639 p = 0.117 248