vasoconstriction, clot formation in blood vessel

anatomy arterial artery attack biology blood capillary cardiology cell cholesterol clot condition corona coronary covid19 crisis diagram disease embolism erythrocyte heart high human hypertension hypertensive illustration infarction medical medicine myocardial narrow narrowing obstruction organ pressure problem pulmonary red science spasm stroke structure system thromboembolism vaccine vascular vasoconstriction vein vessel