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Biomedical subjects

J F Hansen

Publications and source records attributed to J F Hansen.

At least 109 records · Page 6Linked to original sources
PubMed1987

Prognostic value of an electrocardiogram at rest and exercise test in patients admitted with suspected acute myocardial infarction, in whom the diagnosis is not confirmed.

The prognosis following discharge in 217 patients admitted with suspected acute myocardial infarction (AMI) due to chest pain, but in whom AMI was not confirmed, was related to the electrocardiogram (ECG) at rest and a symptom-limited exercise test. The patients were followed for 12 to 24 months, (median 14 months). The end-point was a cardiac event, i.e. non-fatal AMI or cardiac death. The prognosis after discharge was only slightly better than in a comparable group of patients with confirmed AMI (P = 0.05). The percentages without a cardiac event after one year were 91.3 and 86.1, respectively. Impaired prognosis was found in patients with negative T waves or ST depression at rest or with ST--T abnormalities or angina pectoris during exercise. Patients with ST depression or elevation, Q wave or intraventricular block at rest. ST abnormalities during exercise or both constituted a high-risk group. The prognosis was significantly better for patients without these entities. The percentage without a cardiac event after one year was 86.9 and 97.6, respectively. It is concluded that patients in whom AMI is not confirmed have a high risk of cardiac events following discharge. Signs of ischaemic heart disease in the ECG at rest and during exercise can be used to identify high and low risk patients.

Coronary Disease↗
PubMed1985

Premature ventricular beats in healthy adult subjects 20 to 79 years of age.

111 healthy subjects, 57 males and 54 females, 20-79 years of age, randomly selected among the participants of the Copenhagen City Heart Study were tested for ventricular ectopic activity using ambulatory 24-h ECG recording. One or more premature ventricular beats (PVBs) appeared in 68 subjects (61%), 35 males and 33 females (61% of each group). The prevalence of PVBs increased significantly with age: 31, 68 and 84% in the respective age groups: 20-39, 40-59 and 60-79 (P less than 0.05). The number of PVBs per 24 h was less than 24 in 88 (79%), less than 300 in 105 (95%), and less than 500 in 107 (96%). More than 1000 PVBs per 24 h appeared in 3 (2.7%), one of whom had 11 669. The number of PVBs per 24 h increased with age, but the increase was not statistically significant. The number of PVBs per 100 000 recorded QRS-complexes did not differ significantly from the number of PVBs per 24 h. The number of PVBs h-1 was highest in daytime, and apparently higher in males than in females. However, the difference between the two sexes was not statistically significant. Multiform PVBs appeared in 4 subjects, interpolated PVBs in 2, a run of 5 PVBs in 1, dropped beats in 3, two pauses of 1900 ms duration in 1, and several post-acceleration pauses of 1300 ms duration in 1.

Adult↗
PubMed1984

Serum lipoproteins after treatment with verapamil for 6 months.

Fasting levels of serum lipids and lipoproteins were measured in survivors of acute myocardial infarction after 6 months of treatment with placebo (n = 19) or verapamil 360 mg daily (n = 13). There were no significant differences between the groups and values had not changed in the verapamil group 2 weeks after cessation of treatment.

Adult↗
PubMed1984

Verapamil or propranolol in the treatment of stable angina pectoris of effort.

In a double blind cross-over study the effect of verapamil (Isoptin) 360 mg/d and propranolol 180 mg/d was evaluated in patients with stable angina of effort. The results of verapamil and propranolol treatment were compared to a single blind placebo period of 2 weeks. Both verapamil and propranolol caused a significant reduction in nitroglycerin consumption, days with angina pectoris and in severe angina attacks as compared to placebo. A 50% reduction in angina pectoris attacks and/or nitroglycerin consumption compared to placebo was demonstrated in thirteen of eighteen patients during verapamil treatment (P less than 0.01) and in seven of seventeen patients during propranolol treatment (P greater than 0.05). Of sixteen patients completing both treatment periods, ten were improved both on verapamil and propranolol, three on verapamil only, one on propranolol only, one was unchanged and one deteriorated on verapamil and propranolol. During exercise, maximum exercise capacity was increased during verapamil as compared to placebo (P less than 0.01) and propranolol (P less than 0.02). Maximum exercise capacity was not increased after propranolol as compared to placebo. These findings, that verapamil is at least as effective as propranolol in the treatment of angina of effort, are in accordance with other reported series.

Angina Pectoris↗
PubMed1982

Verapamil and beta-adrenoceptor blockade in the treatment of stable angina pectoris.

1. In a double blind cross-over study the effect of verapamil (Isoptin) 360 mg/d and propranolol 180 mg/d was evaluated in patients with stable angina pectoris. The results of verapamil and propranolol treatment are compared to a single blind placebo period of 2 weeks. 2. Both verapamil and propranolol caused a significant reduction in glyceryl trinitrate tablet consumption, days with angina pectoris and in severe angina attacks compared to placebo. A 50% reduction in angina pectoris attacks and/or glyceryl trinitrate consumption compared to placebo was demonstrated in thirteen of eighteen patients during verapamil treatment (P less than 0.01) and in seven of seventeen patients during propranolol treatment (P greater than 0.05). Of sixteen patients accomplishing both treatment periods, ten improved both on verapamil and propranolol, three on verapamil only, one on propranolol only, one was unchanged and one deteriorated on verapamil and propranolol. During exercise, maximum exercise capacity was increased during verapamil compared to placebo (P less than 0.01) and propranolol (P less than 0.02). Maximum exercise capacity was not increased after propranolol compared to placebo. 3. These findings are in accordance with other reported series, and verapamil is at least as effective as propranolol in the treatment of angina pectoris.

Adrenergic beta-Antagonists↗
PubMed1981

Reduced norepinephrine response to dynamic exercise in human subjects during O2 breathing.

The purpose of this investigation was to study the influence of hyperoxia on catecholamine response to dynamic exercise. While breathing either 21 or 100% O2 seven subjects performed submaximal bicycle exercise. Arterial blood pressure was similar in both exercise experiments. The CO2 output was not influenced by 100% O2 breathing, but increments in plasma lactate concentration were reduced. The increases in plasma norepinephrine and epinephrine concentrations and heart rate were significantly lower during 100% O2 than during 21% O2 breathing. The results suggest that O2 plays an important role in the regulation of sympathetic nervous activity during dynamic exercise in humans.

Adult↗