Current utilization of cardiac computed tomography in mainland China: A national survey

J Cardiovasc Comput Tomogr. 2016 Jan-Feb;10(1):76-81. doi: 10.1016/j.jcct.2015.11.004. Epub 2015 Nov 27.

Abstract

Background: Surveys that describe the utilization of cardiac CT are available for the United States, Germany, and Taiwan, but not mainland China.

Objectives: To analyze the clinical utilization of cardiac CT in mainland China.

Methods: A 25-item questionnaire was created and 240 tertiary hospitals were randomly selected to participate. Survey data were collected and confirmed by email as well as phone interviews.

Results: In total, 237 (99%) hospitals consented to this survey, but 85 were excluded because of lack of cardiac CT patient volume or advanced technology. Finally, 152 (64%) questionnaires were available for analysis. Median patient volume was 1,037 patients (range: 150-8,072) annually. The most common clinical indications for coronary CT angiography were exclusion of coronary artery disease in patients with low to intermediate pretest likelihood, asymptomatic individuals with cardiovascular risk factors, and follow-up after coronary bypass grafting. The median heart rate threshold for beta blocker administration was >70 beats/min; most centers (86%) used sublingual nitroglycerin. Prospectively ECG triggered acquisition was the predominant technique in 44% of hospitals. Most (59%) providers adjusted the tube current to the body mass, but few (16%) adjusted the contrast injection rate. Per case, the mean examination duration was 14.2 min; post-processing time 13.6 min; and reporting time 18.0 min.

Conclusions: Cardiac CT is widely established in clinical practice in mainland China but there is a need for more uniform standards regarding performance and clinical utilization.

Keywords: CT angiography; Computed tomography; Coronary artery; Questionnaire.

Publication types

  • Multicenter Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cardiac-Gated Imaging Techniques / statistics & numerical data
  • Coronary Angiography / statistics & numerical data*
  • Coronary Artery Disease / diagnostic imaging*
  • Coronary Artery Disease / epidemiology*
  • Health Care Surveys*
  • Humans
  • Practice Patterns, Physicians' / statistics & numerical data
  • Prevalence
  • Radiation Exposure / analysis
  • Radiation Exposure / statistics & numerical data*
  • Tomography, X-Ray Computed / statistics & numerical data*
  • Utilization Review