atrial premature complexes/hypoxia

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Hypoxemia and arrhythmia during daily activities and six-minute walk test in fibrotic interstitial lung diseases.

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We performed 24-hr monitoring of pulse oximetric saturation (SpO(2)) with ECG and six-minute walk test (6MWT) in 19 patients with fibrotic interstitial lung diseases (ILD) to investigate; 1) The frequency and severity of hypoxemia and dysrhythmia during daily activities and 6MWT, 2) safety of 6MWT,

Hypoxia and cardiac arrhythmias in breath-hold divers during voluntary immersed breath-holds.

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The incidence and nature of cardiac arrhythmias during static apnea were studied by monitoring the electrocardiogram (ECG) and oxygen saturation (SaO(2)) of 16 recreational breath-hold divers. All subjects completed a maximal apnea with a mean (+/-SD) breath-hold duration of 281 (+/-73) s without

Comparative cardiopulmonary effects of carfentanil-xylazine and medetomidine-ketamine used for immobilization of mule deer and mule deer/white-tailed deer hybrids.

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Three mule deer and 4 mule deer/white-tailed deer hybrids were immobilized in a crossover study with carfentanil (10 microg/kg) + xylazine (0.3 mg/kg) (CX), and medetomidine (100 microg/kg) + ketamine (2.5 mg/kg) (MK). The deer were maintained in left lateral recumbency for 1 h with each

[Evaluation of hyperkinetic cardiac arrhythmia in chronic obstructive bronchopneumopathy].

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Patients with chronic obstructive pulmonary disease (COPD), especially during acute exacerbations of their disease, show a greater incidence of cardiac arrhythmias than healthy subjects of the same age. The type of arrhythmias found may be supraventricular (premature atrial beats, paroxysmal

[Cardiac tolerance of a beta 2-sympathomimetic spray in 37 asthmatic adults monitored by Holter recording].

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Thirty-seven asthmatic adults (27 women, 10 men), aged 28 to 70 yrs (mean 50. yrs), in a stable condition, were studied to assess the cardiac tolerance of B2SM sprays. These patients had no cardiac arrhythmia (checked by echocardiography), no hypertension and no hyperthyroidism. Two thirds had

Cardiotoxicities of paclitaxel in African Americans.

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OBJECTIVE To assess the cardiac disturbances in African-American patients treated with paclitaxel. METHODS One-hundred-nineteen African-American patients received paclitaxel for various cancers at Howard University Hospital during the years 1993-2001. Medical records of 100 patients were available

Asthma, cardiac arrhythmias, and albuterol aerosol.

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Twenty asthmatic patients clinically free of heart disease were studied for the possible arrhythmogenic action of albuterol (salbutamol). Two puffs of either albuterol or placebo were inhaled four times per day on two consecutive days and continuous ECG recordings obtained during each 24-hour

Intrapartum fetal atrial bigeminy--diagnostic and therapeutic role of the fetal scalp stimulation test.

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Concern for fetal hypoxia often leads to cesarean delivery when persistent fetal bradycardia is identified. A fetus with premature atrial contractions had a prolonged second-stage heart rate of 80 beats/min. Intrapartum echocardiography and electronic fetal heart rate monitoring distinguished

Serum potassium levels during prolonged hypothermia.

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Hypokalemia (mean serum potassium 2.3 +/- 0.4 mEq/l) was observed in six hypothermic patients (30 degrees - 32 degrees C) with head injuries or brain hypoxia. In the first three patients, potassium was administered to maintain serum levels above 3.5 mEq/l and on rewarming after 48 h of hypothermia

Variation in cardiac markers and electrocardiographic alterations in young calves naturally infected with bovine tropical theileriosis.

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The present study was designed to assess the deleterious effects of bovine tropical theileriosis on the cardiovascular system and the consequent myocardial involvement in young calves. Myocardial effects in parasitic diseases are often neglected. Hemolytic anemia, associated secondary hypoxia, and

Metoprolol in the treatment of multifocal atrial tachycardia.

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Multifocal atrial tachycardia (MAT) is a difficult arrhythmia to treat. Pharmacologic treatment is generally disappointing, and successful conversion in a predictable manner is uncommon. To assess the efficacy of metoprolol, a relatively selective beta 1-adrenergic blocking agent, we administered

Autonomic regulation of the heart and arrhythmogenesis in trained breath-hold divers.

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Breath-hold divers are known to develop cardiac autonomic changes and brady-arrthymias during prolonged breath-holding (BH). The effects of BH-induced hypoxemia were investigated upon both cardiac autonomic status and arrhythmogenesis by comparing breath-hold divers (BHDs) to non-divers

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