“…Several studies showed that BP decreases in the majority of patients but antihypertensive agents are required in a significant proportion of cases in order to achieve a normal BP. Reported rates of BP control vary between 33 and 85% (Table 1), but the definition of normal BP was not uniform in these studies, ranging between 140/90 and 160/100 mmHg (Favia et al 1992, Obara et al 1992, Simon et al 1993, Blumenfeld et al 1994, Weigel et al 1994, Celen et al 1996, Lo et al 1996, Proye et al 1998, Sirén et al 1998, Sapienza & Cavallaro 1999, Shen et al 1999, Brunt et al 2001, Sawka et al 2001, Fukudome et al 2002, Rossi et al 2002, Harris et al 2003, Meria et al 2003, Stowasser et al 2003, Goh et al 2004, Meyer et al 2005, Gockel et al 2007, Pang et al 2007. Table 2 summarizes the criteria used to establish the diagnosis of primary APA in the studies reviewed.…”