Value of reserve pulse pressure in improving the risk stratification of patients with normal myocardial perfusion imaging

Deepak Thomas, Mouaz Al-Mallah, Usha Govindarajulu, Daniel E. Forman, Samia Mora, Marcelo F. Di Carli, Sharmila Dorbala

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

AimsTo evaluate the incremental prognostic value of reserve-pulse pressure (reserve-PP: exercise-PP minus rest-PP) to standard risk factors among patients with suspected coronary artery disease (CAD) but normal exercise myocardial perfusion imaging (MPI).Methods and resultsWe studied 4269 consecutive symptomatic patients without known CAD who were referred for exercise MPI but had normal MPI results (mean age 58 ± 12 years, 56% females, 84% referred for evaluation of chest pain or dyspnoea, 95% with intermediate pretest likelihood of CAD). There were 202 deaths over 5.1 ± 1.4 years of follow-up. Reserve-PP was abnormal (<44 mmHg increase in PP from rest) in 1894 patients (44%). Patients with an abnormal reserve-PP had a higher risk of death compared with patients with normal reserve-PP [hazard ratio (HR): 2.47, 95% CI, 1.8-3.3]. In multivariable models adjusting for age, sex, ejection fraction, medications, heart rate recovery, Duke treadmill score (DTS), and rest-PP, each 10 mmHg lower reserve-PP was associated with a 20.6% increase in risk-adjusted mortality (adjusted HR 0.83, 95% CI 0.76-0.91). Models incorporating reserve-PP significantly reclassified risk compared with models without these parameters (net reclassification index 14.3%, P = 0.0007; integrated discrimination index 0.69, P = 0.01).ConclusionIn patients without a history of CAD and a normal MPI, an abnormal reserve-PP identified and reclassified those at higher risk of death independent of known risk factors and DTS.

Original languageEnglish (US)
Pages (from-to)2074-2081a
JournalEuropean heart journal
Volume34
Issue number27
DOIs
StatePublished - Jul 14 2013

Keywords

  • Myocardial perfusion imaging
  • Normal
  • Prognosis
  • Pulse pressure
  • SPECT

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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