Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
Find Dr. Johnston's expertise for a condition
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- Elite
- Aortic Valve ReplacementDr. Johnston isElite. Learn about Aortic Valve Replacement.
- Constrictive PericarditisDr. Johnston isElite. Learn about Constrictive Pericarditis.
- Distinguished
- Aortic DissectionDr. Johnston isDistinguished. Learn about Aortic Dissection.
- Aortic RegurgitationDr. Johnston isDistinguished. Learn about Aortic Regurgitation.
- Aortic Valve StenosisDr. Johnston isDistinguished. Learn about Aortic Valve Stenosis.
- Bicuspid Aortic ValveDr. Johnston isDistinguished. Learn about Bicuspid Aortic Valve.
- Heart Bypass SurgeryDr. Johnston isDistinguished. Learn about Heart Bypass Surgery.
- Heart Valve RepairDr. Johnston isDistinguished. Learn about Heart Valve Repair.
- Thoracic Aortic AneurysmDr. Johnston isDistinguished. Learn about Thoracic Aortic Aneurysm.
- Transcatheter Aortic Valve Replacement (TAVR)Dr. Johnston isDistinguished. Learn about Transcatheter Aortic Valve Replacement (TAVR).
View All 8 Distinguished Conditions
- Advanced
- Atrial MyxomaDr. Johnston isAdvanced. Learn about Atrial Myxoma.
- Cardiac TamponadeDr. Johnston isAdvanced. Learn about Cardiac Tamponade.
- Coronary Artery Bypass Graft (CABG)Dr. Johnston isAdvanced. Learn about Coronary Artery Bypass Graft (CABG).
- Cystic Medial Necrosis of AortaDr. Johnston isAdvanced. Learn about Cystic Medial Necrosis of Aorta.
- EndocarditisDr. Johnston isAdvanced. Learn about Endocarditis.
- Heart TumorDr. Johnston isAdvanced. Learn about Heart Tumor.
- Mitral Valve RegurgitationDr. Johnston isAdvanced. Learn about Mitral Valve Regurgitation.
View All 7 Advanced Conditions
- Experienced
- AdenoidectomyDr. Johnston isExperienced. Learn about Adenoidectomy.
- Adenosine Deaminase 2 DeficiencyDr. Johnston isExperienced. Learn about Adenosine Deaminase 2 Deficiency.
- Aneurysm RepairDr. Johnston isExperienced. Learn about Aneurysm Repair.
- Anomalous Left Coronary Artery from the Pulmonary Artery
- ArachnodactylyDr. Johnston isExperienced. Learn about Arachnodactyly.
- Congenital Coronary Artery MalformationDr. Johnston isExperienced. Learn about Congenital Coronary Artery Malformation.
- Coronary Artery AneurysmDr. Johnston isExperienced. Learn about Coronary Artery Aneurysm.
- Coronary Artery FistulaDr. Johnston isExperienced. Learn about Coronary Artery Fistula.
- EndoscopyDr. Johnston isExperienced. Learn about Endoscopy.
- Hypertrophic Cardiomyopathy (HCM)Dr. Johnston isExperienced. Learn about Hypertrophic Cardiomyopathy (HCM).
- Lymphofollicular HyperplasiaDr. Johnston isExperienced. Learn about Lymphofollicular Hyperplasia.
- Marfan SyndromeDr. Johnston isExperienced. Learn about Marfan Syndrome.
- May Thurner SyndromeDr. Johnston isExperienced. Learn about May Thurner Syndrome.
- Mediastinal TumorDr. Johnston isExperienced. Learn about Mediastinal Tumor.
- Pacemaker ImplantationDr. Johnston isExperienced. Learn about Pacemaker Implantation.
- Patent Foramen Ovale RepairDr. Johnston isExperienced. Learn about Patent Foramen Ovale Repair.
- Percutaneous Coronary Intervention (PCI)Dr. Johnston isExperienced. Learn about Percutaneous Coronary Intervention (PCI).
- Pleural EffusionDr. Johnston isExperienced. Learn about Pleural Effusion.
- PleurisyDr. Johnston isExperienced. Learn about Pleurisy.
- PneumomediastinumDr. Johnston isExperienced. Learn about Pneumomediastinum.
- Pulmonary FibrosisDr. Johnston isExperienced. Learn about Pulmonary Fibrosis.
- Pulmonary Vein StenosisDr. Johnston isExperienced. Learn about Pulmonary Vein Stenosis.
- Restrictive Cardiomyopathy (RCM)Dr. Johnston isExperienced. Learn about Restrictive Cardiomyopathy (RCM).
- Rheumatic FeverDr. Johnston isExperienced. Learn about Rheumatic Fever.
- Subcutaneous EmphysemaDr. Johnston isExperienced. Learn about Subcutaneous Emphysema.
- Subvalvular Aortic StenosisDr. Johnston isExperienced. Learn about Subvalvular Aortic Stenosis.
- ThyroidectomyDr. Johnston isExperienced. Learn about Thyroidectomy.
- Tricuspid RegurgitationDr. Johnston isExperienced. Learn about Tricuspid Regurgitation.
View All 28 Experienced Conditions
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