- 2013 – Thorac Cardiovasc Surg, Τεύχος 61, Σελ. 435-437 (Lazopoulos G, Papaioannou GI, Kantartzis M.) – “Cardiac Surgery for Ergotamine – Induced Multivalvular Heart Disease.”
- 2012 – EuroΙntervention, Τεύχος 8, Σελ. 116-120 (Kanakakis J, Ntalianis A, Papaioannou G et al) – “Stent for Life Initiative – the Greek experience.”
- 2012 – The American Journal of Cardiology, Τεύχος 109, Σελ. 26-30 (Ahlberg AW, Kazi FA, Azemi T, Katten DM, O’Sullivan DM, Papaioannou GI, Danias PG, Heller GV) – “Usefulness of Stress Gated Technetium-99m Single Photon Emission Computed Tomographic Myocardial Perfusion Imaging for the Prediction of Cardiac Death in Patients with Moderate to Severe Left Ventricular Systolic Dysfunction and Suspected Coronary Artery Disease.”
- 2009 – Journal Of Medical Case Reports, Τεύχος 3, Σελ. 72-35 (Papaioannou GI, Apostolopoulos T, Stambola S et al) – “Late presentation of arrhythmogenic right ventricular cardiomyopathy.”
- 2007 – Hellenic Journal of Cardiology, Τεύχος 48, Σελ. 127-133 (Tzinieris I, Papaioannou GI, Dragomanovits SI, Deliargyris EN) – “Minimizing Femoral Access Complications in Patients Undergoing Percutaneous Coronary Interventions: A Proposed Strategy of Bony Landmark Guided Femoral Access, Routine Access Site Angiography and Appropriate Use of Closure Devices.”
- 2006 – Journal of Nuclear Cardiology, Τεύχος 13, Σελ. 362-368 (Papaioannou GI, Kasapis C, Seip RL, et al) – “Value of peripheral vascular endothelial function in the detection of relative myocardial ischemia in asymptomatic type 2 diabetic patients who underwent myocardial perfusion imaging”
- 2004 – The American Journal of Cardiology, Τεύχος 94, Σελ. 294-299 (Papaioannou GI, Seip RL, Grey NJ, et al) – “Brachial Artery Reactivity in Asymptomatic Patients With Type 2 Diabetes Mellitus and Microalbuminuria (from the Detection of Ischemia in Asymptomatic Diabetics–Brachial Artery Reactivity Study).”
- 2004 – The American Journal of Cardiology, Τεύχος 94, Σελ. 14-19 (Danias PG, Papaioannou GI, Ahlberg AW, et al) – “Usefulness of Electrocardiographic Gated Stress Technetium-99m Sestamibi Single-Photon Emission Computed Tomography to Differentiate Ischemic from Nonischemic Cardiomyopathy.”
- 2004 – Metabolism, Τεύχος 53, Σελ. 278-279 (Papaioannou GI, Lagasse M, Mather JF, Thompson PD) – “Treating hypothyroidism improves endothelial function.”
- 2002 – PACE, Τεύχος 25, Σελ. 1144-1145 (Papaioannou GI, Kluger J) – “Ineffective ICD therapy due to excessive alcohol and exercise.”
- 2000 – Endocrine Practice, Τεύχος 6, Σελ. 351-356 (Economides P, Kaklamani V, Karavas I, Papaioannou GI, Supran S, Mirel D) – “Assessment of physicians responses to abnormal results of bone densitometry studies.”