Cardiovascular diseases during pregnancy and delivery

Nowadays, cardiovascular diseases are the leading cause of maternal morbidity and mortality in the current obstetric practice. PHYSIOLOGICALLY ADAPTED MECHANISMS OF THE CARDIOVASCULAR SYSTEM IN PREGNANCY: It is normal that during pregnancy some physiological adaptive changes of the cardiovascular system occur and they may contribute to the deterioration of the clinical cardiac status of a patient with preexisting or acquired cardiovascular disease. The most prominent adaptive mechanisms include the increase of circulating blood volume, decrease of peripheral vascular resistance and decrease of plasma colloid-oncotic pressure. MOST FREQUENT DISEASES OF THE CARDIOVASCULAR SYSTEM IN PREGNANCY: Due to these changes, pregnant women are prone to tachycardia, palpitations and peripheral edema. Maternal counseling is obligatory for each pregnant woman in order to decrease the maternal morbidity and mortality. The most important predictors of maternal mortality for pregnant women with cardiovascular diseases are severity of pulmonary hypertension, hemodynamic significance of valvular lesion, cyanosis and functional status in heart failure. Cardiovascular diseases in pregnant women may be congenital or acquired. The most frequent congenital cardiac diseases are atrial and ventricular septal defects as well as persistent ductus arteriosus. These diseases are mainly diagnosed and corrected before the pregnancy, or left untreated if hemodynamically insignificant. The most frequent acquired cardiovascular diseases during pregnancy include arrhythmias, ischemic heart disease, rheumatic mitral stenosis and insufficiency, arterial hypertension and aortic dissection.