[Prospective study of subjective stress caused by dobutamine stress echocardiography--effect on diagnostic accuracy].

UNLABELLED: We used a standardized questionnaire to assess physical and mental distress caused by dobutamine stress echocardiography (DSE). The examination was performed according to a standardized protocol (5-40 micrograms/kg/min including atropine). 91 patients (pts), 68 men (62 +/- 9 years), 23 women (65 +/- 7 years) were asked to quantify the severity of the following symptoms: palpitations, anxiety, headache, nausea, discomfort of left lateral position, angina pectoris and dyspnea. Numbers on a rating scale from 1-10 defined the degree of distress. Absence of a symptom equalled mark, 1, slight expression marks 2-4. Moderate expression was defined by marks 5-7 and very strong expression by marks 8-10.

RESULTS: 86% of pts felt affected by one or more symptoms to a slight to moderate extent (mark 4 +/- 2.17). Palpitations were felt by 85% of the pts (mark 6 +/- 2.83), anxiety by 42% (mark 3 +/- 2.5), headache by 50% (3 +/- 2.54), nausea by 20% (2 +/- 1.72), angina pectoris by 42% (3 +/- 2.5), dyspnea by 30% (2 +/- 2.42) and discomfort of left lateral recumbent position by 43% (mark 3 +/- 2.59). 43 pts underwent coronary angiography. The negative predictive value of DSE to identify pts without a coronary artery stenosis extending a 50% diameter reduction was 85% for the 16 pts who reached their individual submaximal heart rate compared to 60% for those 27 pts who did not reach it. Unspecific symptoms led to test termination in these pts. The positive predictive values were comparable (89 and 94%).

CONCLUSION: DSE causes physical and mental distress. If symptoms lead to test termination before age corrected submaximal heart rate is reached, normal wall motion does not exclude significant coronary artery disease.