CFR can be easily determined by TTE in approximately 70% of patients. Noninvasive Doppler echocardiography shows impaired CFR in patients with LAD disease. After stenting CFR is restored, demonstrating early recovery of microvascular tone. These results are comparable to those published in the same conditions. Larger series with a long-term follow-up may allow identifying patients at high risk for restenosis after stenting.
<p><em>A 48-year-old male was admitted to the emergency department because of intermittent chest pain of 2 days duration. At the time of examination, he was pain-free. An electrocardiogram (ECG) showed biphasic T waves in leads V2 to V6. Troponin-I level was negative. During his transfer to the cardiac catheterization laboratory, he had a short episode of chest pain. His ECG was normal. Despite the unusual extension of biphasic T waves to the lateral precordial leads, the condition was recognized as Wellens’ syndrome, which typically associates biphasic or deep symmetric T wave inversion in leads V2 and V3 during pain-free periods with a critical stenosis in the proximal left anterior descending artery. The syndrome is uncommon to medical practice but should be recognized immediately in the emergency department because it represents a pre-infarction stage and carries a high risk of mortality. </em><em></em></p>
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