DEBBIE RITCHIE: Influence Statistics



University of Calgary, Calgary, Alberta, Canada (R.S., P.F., C.A.M., D.R., S.S., C.M.). | Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, ...

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Concepts for which DEBBIE RITCHIE has direct influence: Vasovagal syncope , Vvs patients , Patients vasovagal syncope , Syncope trial , Ventricular tachycardia , Syncope vasovagal , Bifascicular block .


Concepts related to the work of other authors for which for which DEBBIE RITCHIE has influence: Vasovagal syncope , Transient loss , Heart rate variability , Orthostatic intolerance , Differential diagnosis , Physical examination , Epileptic seizures .



University of Calgary, Calgary, Alberta, Canada (R.S., P.F., C.A.M., D.R., S.S., C.M.).


Libin Cardiovascular Institute of Calgary, Alberta, Canada (R.S., M.S.R., D.R., K.M., C.M., J.J., B.G.).


Libin Cardiovascular Institute of Alberta, Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada


Halifax, Nova Scotia


Department of Cardiac Sciences, Libin Cardiovascular Institue of Alberta, University of Calgary, Calgary, Alberta, Canada.


Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada.


Libin Cardiovascular Institute of Calgary Calgary Alberta Canada


Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta


University of Calgary, Calgary, Alberta, Canada


From the University of Calgary, Calgary, Canada (R.S., S.R., D.R., M.-L.K.); McMaster University, Hamilton, Canada (S.C., C.M.); JW Goethe University, Frankfurt, Germany (T. Klingenheben); University of Western Ontario, London, Canada (A.K.); Fundacion Cardiovascular de Columbia, Bucaramanga, Columbia (C.M.); University of Montreal, Montreal, Canada (M.T., T. Ku); and the Cleveland Clinic, Cleveland, Ohio (F.F.-T.).


Cardiovascular Research Group, University of Calgary, Calgary, Alberta, Canada

Prominent publications by DEBBIE RITCHIE

KOL-Index: 10058 . OBJECTIVES: We prospectively sought evidence-based criteria that distinguished between seizures and syncope. BACKGROUND: Loss of consciousness is usually due to either seizures or syncope. There are no evidence-based historical diagnostic criteria that distinguish them. METHODS: A total of 671 patients with loss of consciousness completed a 118-item historical questionnaire. Data sets were ...
Known for Seizures Syncope | Historical Criteria | Loss Consciousness | Specificity Surveys
KOL-Index: 10034 . INTRODUCTION: Vasovagal syncope is common, often recurrent, and reduces quality of life. No therapies have proven useful to improve quality of life in adequately designed randomized clinical trials. Beta-blockers have mixed evidence for effectiveness in preventing syncope. METHODS: The Prevention of Syncope Trial was a randomized, placebo-controlled, double-blind, multinational, clinical ...
Known for Quality Life | Metoprolol Patients | Vasovagal Syncope | Clinical Trial
KOL-Index: 9900 . BACKGROUND: There is limited evidence whether being on fludrocortisone prevents vasovagal syncope. OBJECTIVES: The authors sought to determine whether treatment with fludrocortisone reduces the proportion of patients with recurrent vasovagal syncope by at least 40%, representing a pre-specified minimal clinically important relative risk reduction. METHODS: The multicenter POST 2 ...
Known for Vasovagal Syncope | Controlled Trial | Limited Evidence | Randomized Placebo
KOL-Index: 9371 . BACKGROUND: Previous studies that assessed the effects of beta-blockers in preventing vasovagal syncope provided mixed results. Our goal was to determine whether treatment with metoprolol reduces the risk of syncope in patients with vasovagal syncope. METHODS AND RESULTS: The multicenter Prevention of Syncope Trial (POST) was a randomized, placebo-controlled, double-blind, trial designed ...
Known for Syncope Patients | Vasovagal Tilt | Test Treatment | Matching Placebo
KOL-Index: 7558 . AIMS: Our goal was to develop historical criteria for the diagnosis of vasovagal syncope. METHODS AND RESULTS: We administered a 118-item historical questionnaire to 418 patients with syncope and no apparent structural heart disease. The prevalence of each item was compared between patients with positive tilt tests and those with syncope of other, known causes. The contributions of ...
Known for Vasovagal Syncope | Decision Rule | Male Medical | Point Score
KOL-Index: 6949 . INTRODUCTION: Understanding whether vasovagal syncope is a lifelong disorder might shed insight into its physiology and affect management strategies. Accordingly, we determined the age of the first syncopal spell in adult patients who sought care for syncope. METHODS AND RESULTS: Patients were 42 +/- 18 years old with 64% women. They had had a median 8 syncope spells (interquartile range ...
Known for Vasovagal Syncope | Patients 40 Years | Age Onset | Syncopal Spells
KOL-Index: 6557 . INTRODUCTION: to develop evidence-based criteria that distinguish syncope due to ventricular tachycardia (VT) from vasovagal syncope (VVS) in patients with structural heart disease (SHD). METHODS AND RESULTS: one hundred and thirty-four patients with syncope and SHD completed a 118-item questionnaire and underwent noninvasive and invasive diagnostic assessments in a prospective cohort ...
Known for Ventricular Tachycardia | Syncope Patients | Structural Heart Disease | Historical Criteria
KOL-Index: 6506 . INTRODUCTION: accurate selection of patients for vasovagal syncope studies requires strong risk stratification and knowledge of the natural history of syncope. We aimed to test the hypothesis that recent history of vasovagal syncope compared to distant history better predicts subsequent recurrence of syncope. METHODS AND RESULTS: in all, 208 subjects with a positive tilt test and ≥ 3 ...
Known for Vasovagal Syncope | Preceding Year | Tilt Test | Risk Stratification
KOL-Index: 6284 . AIMS: To develop a brief syncope-specific measure of health-related quality of life. METHODS AND RESULTS: One hundred and fourteen patients with syncope completed a 48-item questionnaire derived from a generic measure of quality of life (the EQ-5D), the Syncope Functional Status Questionnaire, a depression scale (the CES-D) and historical symptoms. From these, clinical impact methodology ...
Known for Quality Life | Impact Syncope | Convergent Validity | Female Health
KOL-Index: 6209 . OBJECTIVES: We sought to determine whether the long-range measures of heart rate variability (HRV)--the standard deviation of sequential 5-min heart period mean values (SDANN) and the heart period spectral amplitude in the ultra-low frequency band <0.0033 Hz (ULF)--had their origins partly in physical activity. BACKGROUND: The SDANN and ULF are prognostic HRV factors whose physiologic ...
Known for Heart Rate | Prognostic Measures | Physical Activity | 00001 Ulf
KOL-Index: 5993 . BACKGROUND: Vasovagal syncope (VVS) patients have a reduced health-related quality of life (HRQoL). There are limited data comparing HRQoL and psychological profile in VVS patients and healthy individuals. We tested the hypothesis that VVS patients have greater impairment in both HRQoL and psychological profile compared to healthy nonfainting individuals, and that both outcome measures are ...
Known for Vvs Patients | Healthy Participants | Vasovagal Syncope | Quality Life
KOL-Index: 5631 . BACKGROUND: Recurrent vasovagal syncope is common, responds poorly to treatment, and causes physical trauma and poor quality of life. Midodrine prevents hypotension and syncope during tilt tests in patients with vasovagal syncope. OBJECTIVE: To determine whether midodrine can prevent vasovagal syncope in usual clinical conditions. DESIGN: Randomized, double-blind, placebo-controlled ...
Known for Vasovagal Syncope | Male Midodrine | Patients Recurrent | Controlled Clinical
KOL-Index: 5406 . Objectives In this study, the authors tested whether a strategy of empiric permanent pacing reduces major composite events more effectively than acting on the results of an implantable cardiac monitor (ICM). Background Syncope may be caused by intermittent complete heart block in patients with bifascicular heart block, but competing diagnoses coexist. Whether empiric permanent pacing or ...
Known for Bifascicular Block | Cardiac Monitor | Empiric Permanent Pacing | 33 Months
KOL-Index: 4865 . BACKGROUND: Frequent syncope is linked to poorer health-related quality of life (HRQoL). Recurrent syncope has been observed to reduce in all groups after seeing a syncope expert and enrolling in a clinical trial. It is unknown if HRQoL improves with this reduction in syncope recurrence. OBJECTIVES: We examined the change in HRQoL over time in vasovagal syncope (VVS) patients seen by a ...
Known for Syncope Patients | Quality Life | Clinical Trial | 12 Months
KOL-Index: 4280 . INTRODUCTION: Vasovagal syncope is common and distressing. One important symptom is presyncope, but there are no clinimetric measures of this. We developed the Calgary Presyncope Form (CPF) and used it to test whether metoprolol reduces presyncope in a randomized trial. METHODS: The CPF captures the frequency, duration, and severity of presyncope. We administered it to participants in the ...
Known for Syncope Presyncope | Patients Metoprolol | Clinical Trial | Observation Period

Key People For Vasovagal Syncope

Top KOLs in the world
Richard Sutton
vasovagal syncope cardiac pacing orthostatic hypotension
Michele Brignole
cardiac pacing vasovagal syncope atrial fibrillation
David Guay Benditt
atrial fibrillation vasovagal syncope cardiac pacing
irish longitudinal study orthostatic hypotension older people
Wouter Wieling
blood pressure vasovagal syncope orthostatic hypotension
Robert Stanley Sheldon
vasovagal syncope atrial fibrillation emergency department

University of Calgary, Calgary, Alberta, Canada (R.S., P.F., C.A.M., D.R., S.S., C.M.). | Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada | Libin Cardiovascular Institute of Calgary, Alberta, Canada (R.S., M