Clinical trial NCT00421239: Risk Factors of Hypertensive Urgencies
Official title: Retrospective Study of Hypertensive Urgencies in Patients With Arterial Hypertension
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Hypertensive Urgency
Keywords: hypertensive urgency
arterial hypertension
Lead sponsor: Russian Cardiology Research and Production Center
Sponsor class: OTHER
Collaborators: name: KRKA
First posted: 2007-01-11
Enrollment: 1200
Sex: ALL
Minimum age (years): 18
Maximum age (years): 79
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_CONTROL
Time perspective: RETROSPECTIVE
Sampling method: PROBABILITY_SAMPLE
Study population: Participants will be selected from hospital/policlinic database by random telephone dialing to every third patient who are diagnosed with arterial hypertension (SBP/DBP\>140/90 Hg or taking antihypertensive drugs)

Brief summary: The purpose of this study is to determine whether frequent hypertensive urgencies increase the risk of cardiovascular events in patients with arterial hypertension.

Detailed description: The spectrum of disorders associated with arterial hypertension (AH) encompasses chronic uncomplicated hypertension and the hypertensive crises, including hypertensive urgences and emergencies. Hypertensive crises accounted for more than 25% of all patient visits to a medical section of an emergency department, with hypertensive urgences (HU) accounting for two-third of these cases. Hypertensive crises, without prompt treatment, are often associated with morbidity and mortality. We propose to conduct a population-based case-control study of HU in areas of the Russian Federation. We will include about thirty study centers and one data coordinating center and will recruit study participants over a period of one years. We plan to conduct in-person interviews with 1,500 cases and 1,500 controls to elicit information on demographic background and history of exposures. We intend to test about 20-25 risk factors of HU thus calculated target number of subject is 3000 pts. We're going to get access to hospital lists in each study center. From the database we'll select patients with AH and recruit every third participant who came to hospital or/and policlinic. Every selected participant will be asked to respond to some questions by phone and be divided into two groups. Participants who have HU two weeks before the call will be questioned about level of arterial pressure and treatment during HU. Participants with often HU (every week or more) will be included into first group (prevalent cases, group A). Participants with seldom HU (every month or less) will be included into second group (controls, group B). Cases and controls will be selected from the same population of AH patients. Questionnaire contains information about age, gender, tobacco use, data about HU (frequency, treatment and its complications), antihypertensive and concomitant treatment, level of blood pressure, regularity of taking antihypertensive drugs, associated clinical conditions (cerebrovascular disease, heart disease, renal disease, peripheral vascular disease), PCI, CABG, if it be possible we intend to collect information of factors influencing prognosis (fasting plasma glucose, dyslipidaemia, serum creatinine, serum uric acid, left ventricular hypertrophy).

Eligibility criteria: Inclusion Criteria:

* Cases: every third patient from hospital/policlinic database who are diagnosed with arterial hypertension (SBP/DBP\>140/90 Hg or taking anti hypertensive drugs) and with frequent (weekly or daily) hypertensive urgencies (SBP/DBP≥180/110 Hg) will be potentially eligible for the study.
* Controls will be selected from the same population of participants by random telephone dialing to every third patient with arterial hypertension (SBP/DBP\>140/90 Hg or taking anti hypertensive drugs) and with seldom (monthly, several times in the year or never) hypertensive urgencies.

Exclusion Criteria:

* Hypertensive emergency

Primary outcomes:
Secondary outcomes:
Other outcomes:
Locations:
city: Moscow
country: Russian Federation
facility: Russian Cardiology Research and Production Center
Study officials:
affiliation: Russian Cardiology Research and Production Center
name: Evgeniy I Chazov, MD
role: STUDY_CHAIR
References: