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[目的]研究原发性高血压病患者昼夜血压节律异常与左心室肥厚的相关性。[方法]选取本院2012年5～10月收治的100例原发性高血压病患者作为研究对象，所有患者经24 h动态血压监测分为杓型组与非杓型组，其中杓型组54例，非杓型组46例，比较两组患者的24 h动态血压监测的情况以及超声心动图的各项指标。[结果]非杓型组的24h SBP、24h DBP、昼间SBP、夜间SBP均明显高于杓型组，两组患者动态血压差异具有统计学意义（ P ＜0．05）；非杓型组的左心室后壁厚度（LVPW）、室间隔厚度（IVS）、左心室重量（LVM ）、左心室重量指数（LVMI）均较杓型组有着显著的增加，且差异具有统计学意义（ P ＜0．05）。[结论]原发性高血压病患者昼夜血压节律异常对于左心室肥厚的发生、发展有着明显的促进作用，显著影响左心室的舒张功能。“,”[Objective] To study the correlation between abnormal circadian blood pressure rhythm and left ventricular hypertrophy .[Methods] Totally 100 patients with essential hypertension in our hospital from May 2012 to Oct .2013 were selected as the study subjects .All patients were divided into dipper group ( n =54) and non-dipper group( n=46) by 24h-ambulatory blood pressure monitoring .The 24h-ambulatory blood pressure mo-nitoring situation and echocardiographic indicators were compared between two groups .[Results]The 24h SBP , 24h DBP ,day SBP and night SBP of non-dipper group were obviously higher than those of dipper group ,and there was significant difference in ambulatory blood pressure between two groups ( P < 0 .05) .Compare with dipper group ,LVPW ,IVS ,LVM and LVMI in non-dipper group increased markedly ,and there was significant differ-ence( P <0 .05) .[Conclusion] Abnormal circadian blood pressure rhythm of patients with essential hypertension play a significant role in promoting the occurrence and development of left ventricular hypertrophy .It significantly influences left ventricular diastolic function .