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Biomedical subjects

I A Ovsyshcher

Publications and source records attributed to I A Ovsyshcher.

17 recordsLinked to original sources
PubMed1991

Transesophageal electrocardiography using a temporary pacing balloon-tipped electrode in acute cardiac care.

STUDY OBJECTIVE: The study was undertaken to determine the feasibility of obtaining esophageal ECGs using resterilized 3F temporary pacing balloon-inflated electrodes in place of the more expensive pill-electrode and its associated expensive preamplifier. SETTING: Tests were conducted in the emergency department and ICU. TYPE OF PARTICIPANTS: Subjects were 12 acutely ill patients for whom standard 12-lead surface ECGs were insufficient to afford accurate, immediate arrhythmia diagnosis. INTERVENTIONS: Reasonable quality esophageal ECGs were obtained by use of the electrodes, generally with minimal patient discomfort. The test never required more than ten minutes. Of the 12 patients who participated in this preliminary study, esophageal ECGs enabled definitive diagnoses to be made in ten cases. CONCLUSION: The use of resterilized temporary pacing balloon-inflated electrodes enables esophageal ECGs to be obtained in an acute care setting.

Arrhythmias, Cardiac↗
PubMed1990

Concomittant ST elevation in inferior and anterior leads in acute myocardial infarction. Clinical and anatomical significance.

Various instances of acute myocardial infarction that may cause concomittant ST-segment elevation in inferior and anterior leads are presented. Among the situations that produce this phenomenon are: (1) multivessel coronary artery disease or isolated disease of a dominant left anterior descending artery causing combined inferior and anterior myocardial infarction; and (2) isolated disease of a right coronary artery causing combined infarction, or isolated right ventricular myocardial infarction. The mechanisms responsible for the electrocardiographic patterns in each instance are discussed.

Coronary Disease↗
PubMed1988

Complete atrioventricular block induced by methyldopa.

We present two patients who developed complete heart block due to treatment with methyldopa. After discontinuing methyldopa, conduction disturbances completely disappeared and recurred upon rechallenge with the medication. It is assumed that methyldopa can impair the myocardial conduction system by its central sympatholytic effect. Conduction anomalies should be excluded prior to treatment with methyldopa, and during treatment with the medication, the patients should be routinely screened for the presence of conduction anomalies.

Aged↗
PubMed1987

ST elevation in leads V1 to V4 caused by isolated right ventricular ischemia and infarction.

A patient with isolated right ventricular ischemia and infarction is presented. ST elevation in leads V1 to V4 mimicking anteroseptal myocardial infarction was recorded at admission and during episodes of chest pain later on. Noninvasive and invasive workup suggested isolated right ventricular infarction and ischemia due to an occluded small and nondominant right coronary artery.

Arterial Occlusive Diseases↗
PubMed1978

Congenital QT interval prolongation. A review with a survey of three families.

The prolonged QT interval syndrome without hearing loss (Romano-Ward syndrome) is described in three families with 48 affected members. Syncope or dizziness caused by different ventricular tachyarrhythmias were the presenting symptoms in the symptomatic patients. Four of the subjects died suddenly. Right stellate ganglionectomy was performed in one patient in order to abolish the ventricular dysrhythmia. beta-blockers are considered the drug of choice in patients with hereditary prolonged QT interval; if the beta-blockers fail to abolish the syncopal attacks of severe bradycardia complicates the clinical course, a pharmacological blockade of the stellate ganglia should be performed and its results carefully evaluated in order to establish whether a stellate ganglionectomy is justified.

Adult↗
PubMed1975

A statistical approach to the recognition of inferior wall myocardial infarction by the Q/R ratios.

To sharpen ECG criteria for diagnosis of inferior wall myocardial infarction (IWMI), the distribution of Q duration and Q/R ratios in leads 3 and aVF in four groups have been analyzed. Two of these groups are teaching samples (200 ECGs of patients with various diagnoses, but in whom no myocardial infarction was found on post-mortem, and 123 ECGs of patients in whom IWMI was found on post-mortem examinations) and two control samples (408 ECGs of healthy men and 60 ECGs of patients with clinically proved IWMI). The chosen combination of conditions Q/R3 greater than 25 percent and Q/RaVF greater than 10 per cent gives minimal number of errors for the teaching samples. The diagnostic rule gave 5-7 percent errors over the control samples. It is shown that use of Q duration greater than 0.04'' gives less satisfactory results in the diagnosis of IWMI.

Diagnosis, Computer-Assisted↗