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. 2011 Dec 7;2011(12):CD008691. doi: 10.1002/14651858.CD008691.pub2

Worthley 2003.

Clinical features and settings Clinical features
  • ESKD patients with multiple risk factors (> 60 years; HTN; DM; history of smoking; family history of CAD; hypercholesterolaemia) undergoing cardiac evaluation as part of transplant workup


Setting
  • North Western Adelaide Health Service, University of Adelaide, Australia

Participants
  • Number: 40

  • DM: 78%

  • Angina pectoris or IHD: 18%

  • Hypertension: 98%

  • Sex: 48% male


Exclusion criteria
  • Normal coronary angiography within the preceding 2 years; coronary revascularisation within the last 12 months; evidence of previous Q‐wave infarction on ECG at rest; class III to IV angina pectoris at study entry

Study design Cohort study
Target condition and reference standard(s) Coronary artery stenosis measured by coronary angiography
  • Angiograms were assessed by 2 cardiologists who were blinded to the perfusion imaging results. A significant coronary stenosis was defined as > 70%

Index and comparator tests Tachycardic‐stress perfusion imaging
  • All patients underwent induction of tachycardiac stress via treadmill exercise or temporary cardiac pacing. Treadmill exercise was performed using the Bruce protocol, on a symptom‐limited basis. Exercise was deemed adequate if peak heart rate was > 75% of the theoretic maximal values, or if exercise was terminated because of angina pectoris. Pacing was performed in patients unable to attain adequate stress on treadmill testing. Pacing was performed at the time of cardiac catheterisation, but before coronary angiography. Myocardial imaging was achieved by IV injection of technetium‐99m tetrofosmin (400 MBq) 1 minute before termination of tachycardiac stress. Images were acquired on a triple‐headed gamma camera with 180° single‐photon emission CT. The images were assessed by nuclear cardiologists who were blinded to the cardiac catheterisation results.

Follow‐up Mean follow‐up of 28 ± 10 months.
Notes Informed consent was obtained before study entry.
Table of Methodological Quality
Item Authors' judgement Description
Representative spectrum? 
 All tests Yes ESKD patients undergoing cardiac evaluation as part of transplant workup.
Acceptable reference standard? 
 All tests Yes Coronary angiography with a reference standard threshold of ≥ 70% stenosis.
Acceptable delay between tests? 
 All tests Yes Tests were done at the same time (author correspondence).
Partial verification avoided? 
 All tests Yes All participants who underwent the index test received the reference standard test.
Differential verification avoided? 
 All tests Yes Disease status (CAD) diagnosed by coronary angiography.
Incorporation avoided? 
 All tests Yes Disease status (CAD) diagnosed by coronary angiography.
Reference standard results blinded? 
 All tests Yes Angiograms were assessed by 2 cardiologists who were blinded to the perfusion imaging results.
Index test results blinded? 
 All tests Yes Images were assessed by nuclear cardiologists who were blinded to the cardiac catheterisation results.
Relevant clinical information? 
 All tests Yes Relevant clinical information was provided regarding the performance and analysis of the index and reference tests.
Uninterpretable results reported? 
 All tests Yes There were no uninterpretable test results.
Withdrawals explained? 
 All tests Yes No withdrawals reported.

bpm: beats per minute; CAD: coronary artery disease; CF: cardiac failure; CHF: congestive heart failure; CIMT: carotid intimal medial thickness; CKD: chronic kidney disease; CVD: cardiovascular disease; DBP: diastolic blood pressure; DM: diabetes mellitus; DSE: dobutamine stress echocardiogram; DSTS: dipyridamole stress thallium scan; EBCT: electron beam computed tomography; ECG: electrocardiogram; ESKD: end‐stage kidney disease; HTN: hypertension; IHD: ischaemic heart disease; IMT: intimal media thickness; IV: intravenous; MI: myocardial infarction; MIBI: methoxyisobutyl isonitrile stress; MPS: myocardial perfusion scintigraphy; QCA: quantitative coronary analysis; RRT: renal replacement therapy; RWM: regional wall motion; SBP: systolic blood pressure; ST: sinus tachycardia; WMA: wall motion abnormality