Marcos Doederlein Polito

Validação do monitor de medida de pressão arterial Omron HEM 742 em adolescentes

BACKGROUND Accurate blood pressure measurement is fundamental for scientific investigation or clinical decision-making. In this sense, it is important to verify the values provided by electronic devices. OBJECTIVE To validate the Omron HEM 742 blood pressure monitoring device in adolescents according to criteria suggested by the British Hypertension Society. METHODS A total of 150 adolescents aged between 10 and 16 years participated in the study. The automated Omron HEM 742 monitor was connected in Y to the mercury column auscultatory device, then three simultaneous measurements were taken, and the differences between the readings of the two devices were calculated. The intraclass correlation coefficient and Bland-Altman plot (agreement) were used to verify the relationship between both devices. Specificity and sensitivity of the device were determined by using the ROC curve. RESULTS The comparison between the measurements showed an equal to or lower than 5mmHg difference in 67.3% of the systolic values, and 69.3% of the diastolic values; an equal to or lower than 10mmHg difference occurred in 87.3% and 90.6% of the systolic and diastolic values, respectively; an equal to or lower than 15mmHg difference was found in 96.6% of the systolic values and 97.3% of the diastolic values. These findings are consistent with a grade A according to the British Hypertension Society protocol. A marked consonance was observed between the values obtained by the automated monitor and this device was proven to be capable of identifying the presence or absence of high blood pressure. CONCLUSION The Omron HEM 742 monitor was proved valid for blood pressure measurement in adolescents according to the criteria suggested by the British Hypertension Society.BACKGROUND: Accurate blood pressure measurement is fundamental for scientific investigation or clinical decision-making. In this sense, it is important to verify the values provided by electronic devices. OBJECTIVE: To validate the Omron HEM 742 blood pressure monitoring device in adolescents according to criteria suggested by the British Hypertension Society. METHODS: A total of 150 adolescents aged between 10 and 16 years participated in the study. The automated Omron HEM 742 monitor was connected in Y to the mercury column auscultatory device, then three simultaneous measurements were taken, and the differences between the readings of the two devices were calculated. The intraclass correlation coefficient and Bland-Altman plot (agreement) were used to verify the relationship between both devices. Specificity and sensitivity of the device were determined by using the ROC curve. RESULTS: The comparison between the measurements showed an equal to or lower than 5mmHg difference in 67.3% of the systolic values, and 69.3% of the diastolic values; an equal to or lower than 10mmHg difference occurred in 87.3% and 90.6% of the systolic and diastolic values, respectively; an equal to or lower than 15mmHg difference was found in 96.6% of the systolic values and 97.3% of the diastolic values. These findings are consistent with a grade A according to the British Hypertension Society protocol. A marked consonance was observed between the values obtained by the automated monitor and this device was proven to be capable of identifying the presence or absence of high blood pressure. CONCLUSION: The Omron HEM 742 monitor was proved valid for blood pressure measurement in adolescents according to the criteria suggested by the British Hypertension Society.

Validation of the omron HEM 742 blood pressure monitoring device in adolescents

BACKGROUND Accurate blood pressure measurement is fundamental for scientific investigation or clinical decision-making. In this sense, it is important to verify the values provided by electronic devices. OBJECTIVE To validate the Omron HEM 742 blood pressure monitoring device in adolescents according to criteria suggested by the British Hypertension Society. METHODS A total of 150 adolescents aged between 10 and 16 years participated in the study. The automated Omron HEM 742 monitor was connected in Y to the mercury column auscultatory device, then three simultaneous measurements were taken, and the differences between the readings of the two devices were calculated. The intraclass correlation coefficient and Bland-Altman plot (agreement) were used to verify the relationship between both devices. Specificity and sensitivity of the device were determined by using the ROC curve. RESULTS The comparison between the measurements showed an equal to or lower than 5mmHg difference in 67.3% of the systolic values, and 69.3% of the diastolic values; an equal to or lower than 10mmHg difference occurred in 87.3% and 90.6% of the systolic and diastolic values, respectively; an equal to or lower than 15mmHg difference was found in 96.6% of the systolic values and 97.3% of the diastolic values. These findings are consistent with a grade A according to the British Hypertension Society protocol. A marked consonance was observed between the values obtained by the automated monitor and this device was proven to be capable of identifying the presence or absence of high blood pressure. CONCLUSION The Omron HEM 742 monitor was proved valid for blood pressure measurement in adolescents according to the criteria suggested by the British Hypertension Society.BACKGROUND: Accurate blood pressure measurement is fundamental for scientific investigation or clinical decision-making. In this sense, it is important to verify the values provided by electronic devices. OBJECTIVE: To validate the Omron HEM 742 blood pressure monitoring device in adolescents according to criteria suggested by the British Hypertension Society. METHODS: A total of 150 adolescents aged between 10 and 16 years participated in the study. The automated Omron HEM 742 monitor was connected in Y to the mercury column auscultatory device, then three simultaneous measurements were taken, and the differences between the readings of the two devices were calculated. The intraclass correlation coefficient and Bland-Altman plot (agreement) were used to verify the relationship between both devices. Specificity and sensitivity of the device were determined by using the ROC curve. RESULTS: The comparison between the measurements showed an equal to or lower than 5mmHg difference in 67.3% of the systolic values, and 69.3% of the diastolic values; an equal to or lower than 10mmHg difference occurred in 87.3% and 90.6% of the systolic and diastolic values, respectively; an equal to or lower than 15mmHg difference was found in 96.6% of the systolic values and 97.3% of the diastolic values. These findings are consistent with a grade A according to the British Hypertension Society protocol. A marked consonance was observed between the values obtained by the automated monitor and this device was proven to be capable of identifying the presence or absence of high blood pressure. CONCLUSION: The Omron HEM 742 monitor was proved valid for blood pressure measurement in adolescents according to the criteria suggested by the British Hypertension Society.

Cardiovascular and autonomic responses after exercise sessions with different intensities and durations

BACKGROUND: Several studies have reported the phenomenon of post-exercise hypotension. However, the factors that cause this drop in blood pressure after a single exercise session are still unknown. OBJECTIVE: To investigate the effects of aerobic exercise on the acute blood pressure response and to investigate the indicators of autonomic activity after exercise. METHODS: Ten male subjects (aged 25 ± 1 years) underwent four experimental exercise sessions and a control session on a cycle ergometer. The blood pressure and heart rate variability of each subject were measured at rest and at 60 min after the end of the sessions. RESULTS: Post-exercise hypotension was not observed in any experimental sessions (P > 0.05). The index of parasympathetic neural activity, the RMSSD, only remained lower than that during the pre-exercise session after the high-intensity session (Δ  = -19 ± 3.7 for 15-20 min post-exercise). In addition, this value varied significantly (P < 0.05) between the high- and low-intensity sessions (Δ  =  -30.7 ± 4.0 for the high intensity session, and Δ  =  -9.9 ± 2.5 for the low intensity session). CONCLUSION: The present study did not find a reduction in blood pressure after exercise in normotensive, physically active young adults. However, the measurements of the indicators of autonomic neural activity revealed that in exercise of greater intensity the parasympathetic recovery tends to be slower and that sympathetic withdrawal can apparently compensate for this delay in recovery.

Influência do estado de treinamento sobre o comportamento da pressão arterial após uma sessão de exercícios com pesos em idosas hipertensas

BACKGROUND: There are few studies on post-resistance exercise hypotension in hypertensive older females. PURPOSE: To verify the acute systolic (SBP), diastolic (DBP), and mean arterial pressure (MAP) response after a resistance exercise session performed by hypertensive elderly subjects with and without experience in resistance training. METHODS: Fifteen elderly women (66 ± 4 yrs; 63.9 ± 9.1 kg; 1.6 ± 0.1 m) were divided in trained group (TG; n = 6) and non-trained group (NTG; n = 9). The sample performed a control session (CS - seated during 40 min) and experimental session (ES - seven resistance exercises; two sets; 10-15 RM). Blood pressure was assessed by auscultation after 10 min at rest (pre-exercise) and every 15 min during 60 min post-exercise. RESULTS: No difference was identified between groups at rest. The analysis of variance showed drop to SBP at 30 min after exercises (P = 0.03) in ES and no difference for CS. NTG showed drop to SBP (P<0.001) and MBP (P<0.01) at 15, 30, 45 e 60 min post-exercise, and DBP (P = 0.02) at 15o and 30o min in ES. In the CS, SBP (P = 0.006) and MBP (P = 0.04) were higher than rest at 15, 45 and 60 min. CONCLUSION: A single resistance exercise session can reduce blood pressure in hypertensive elderly women, especially in a non-trained group.

Evaluation of the Omron MX3 Plus monitor for blood pressure measurement in adolescents

This study analyzed the accuracy/agreement of the Omron MX3 monitor on 165 adolescents. Blood pressure was measured by the automatic monitor connected in Y with the mercury column (three consecutive and simultaneous measures). The independent measures were analyzed, and the mean differences between systolic and diastolic measures for both methods were calculated and compared with British Hypertension Society (BHS) and Association for the Advancement of Medical Instrumentation (AAMI) criteria. The automatic monitor received the highest degree of BHS recommendations for systolic and diastolic blood pressures according to the BHS. The median (25th and 75th) difference between the observer and the monitor measurements was −2 (−6 and 1) mmHg for systolic and 0 (−3 and1) mmHg for diastolic pressures. The monitor also satisfies the AAMI standard for the studied population. In conclusion, the Omron MX3 Plus monitor can be considered reliable and valid for clinical practice and is in accordance with BHS and AAMI criteria.

Hipotensão pós-exercício em indivíduos hipertensos: uma revisão

Post-exercise hypotension (PEH) may follow a session of physical exercises. This effect has high clinical relevance for hypertensive individuals. Although there are several studies on the subject, an analysis is still lacking on a state-of-art approach considering different types of exercises. Using a review of literature, the aim of this paper was to verify the relationship between aerobic exercise and resistance exercise in PEH in hypertensive people. For the purpose of this study, Scielo and Medlinedatabases were surveyed, and the main inclusion criteria were studies on the subject in English language and a sample of hypertensive adults. One hundred and twenty-six studies were found. However, only 32 papers, 5 of which on resistance exercise and 27 on aerobic exercise were used for this study. Although the studies surveyed used different prescription models for resistance exercise, PEH was observed mainly in the laboratory setting. After aerobic exercise, it was noted that PEH occurred for longer periods. However, there are differences of opinion as to the best intensity and duration of the exercise to be prescribed. Therefore, in hypertensive individuals declines in arterial pressure following aerobic exercise are apparently greater than those observed with resistance exercise. Nevertheless, in order to achieve sounder conclusions, further studies on ambulatory blood pressure monitoring should be conducted.Post-exercise hypotension (PEH) may follow a session of physical exercises. This effect has high clinical relevance for hypertensive individuals. Although there are several studies on the subject, an analysis is still lacking on a state-of-art approach considering different types of exercises. Using a review of literature, the aim of this paper was to verify the relationship between aerobic exercise and resistance exercise in PEH in hypertensive people. For the purpose of this study, Scielo and Medlinedatabases were surveyed, and the main inclusion criteria were studies on the subject in English language and a sample of hypertensive adults. One hundred and twenty-six studies were found. However, only 32 papers, 5 of which on resistance exercise and 27 on aerobic exercise were used for this study. Although the studies surveyed used different prescription models for resistance exercise, PEH was observed mainly in the laboratory setting. After aerobic exercise, it was noted that PEH occurred for longer periods. However, there are differences of opinion as to the best intensity and duration of the exercise to be prescribed. Therefore, in hypertensive individuals declines in arterial pressure following aerobic exercise are apparently greater than those observed with resistance exercise. Nevertheless, in order to achieve sounder conclusions, further studies on ambulatory blood pressure monitoring should be conducted.

Effects of rest interval between exercise sets on blood pressure after resistance exercises

BACKGROUND Although studies have demonstrated the occurrence of postexercise hypotension (PEH) in resistance exercises, there is still no consensus on an ideal protocol. OBJECTIVE To evaluate the effects of different rest intervals (RI) between resistance exercise (RE) sets on postexercise blood pressure (BP). METHODS Sixteen sedentary non-hypertensive young men performed three RE protocols with RI of 1 (P1), 2 (2) and 3 (P3) minutes between the sets, as well as a control protocol (CON), in a counterbalanced manner. The RE protocols consisted of three sets of eight repetitions in six exercises. The loads used in the 1st, 2nd, and 3rd exercise sets were 80%, 70% and 60% of one repetition maximum (1RM), respectively. Measurements were taken at rest (RES), 15 (T15), 30 (T30), 45 (T45), 60 (T60), 75 (T75), and 90 (T90) minutes after the session. Factorial analysis of variance (Anova) was carried out, followed by post hoc LSD. RESULTS No significant change was found in systolic BP after the protocols. A significant increase in diastolic BP was verified after CON at timepoints T45 and T90. Significant reduction in diastolic BP occurred after P1 and P3, with duration of 30 and 15 minutes, respectively. No significant differences were found in the systolic and diastolic BP responses between the protocols with different RI. CONCLUSION RI does not seem to influence systolic BP reduction after an RE session. However, reductions in diastolic BP (P1 and P3) lasting up to 30 minutes were observed.FUNDAMENTO: Apesar de os estudos demonstrarem a ocorrencia da hipotensao pos-exercicio (HPE) em exercicios resistidos, ainda nao ha consenso sobre um protocolo ideal. OBJETIVO: Avaliar os efeitos de diferentes intervalos de recuperacao (IR) entre series de exercicio resistido (ER) na pressao arterial (PA) pos-exercicio. METODOS: Dezesseis homens jovens sedentarios e nao hipertensos realizaram, de forma contrabalanceada tres protocolos de ER com 1 (P1), 2 (P2) e 3 (P3) minutos de IR entre as series, e um protocolo controle (CON). Os protocolos de ER consistiram em tres series de oito repeticoes em seis exercicios. As cargas utilizadas na 1a, 2a e 3a serie dos exercicios foram respectivamente 80, 70 e 60% de 1 repeticao maxima (1RM). As medidas foram realizadas em repouso (REP), 15 (T15), 30 (T30), 45 (T45), 60 (T60), 75 (T75) e 90 (T90) minutos apos a sessao. Foi realizada uma analise de variância fatorial (ANOVA) com post hoc LSD. RESULTADOS: Nao foi encontrada alteracao significativa na PA sistolica apos os protocolos. Foi encontrado um aumento significativo da PA diastolica, apos o CON, nos momentos T45 e T90. Ocorreu reducao significativa na PA diastolica apos P1 e P3, com duracao de 30 e 15 minutos respectivamente. Nao foram encontradas diferencas significativas nas respostas da PA sistolica e diastolica entre os protocolos com diferentes IR. CONCLUSAO: Parece que o IR nao influencia a reducao da PA sistolica apos uma sessao de ER. No entanto, foi encontrada uma queda na PA diastolica (P1 e P3) com duracao de ate 30 minutos.

Haemodynamic responses during resistance exercise with blood flow restriction in hypertensive subjects

This study aimed to compare haemodynamic responses during resistance exercise with blood flow restriction (BFR) in hypertensive women.

A review on post-exercise hypotension in hypertensive individuals

Post-exercise hypotension (PEH) may follow a session of physical exercises. This effect has high clinical relevance for hypertensive individuals. Although there are several studies on the subject, an analysis is still lacking on a state-of-art approach considering different types of exercises. Using a review of literature, the aim of this paper was to verify the relationship between aerobic exercise and resistance exercise in PEH in hypertensive people. For the purpose of this study, Scielo and Medlinedatabases were surveyed, and the main inclusion criteria were studies on the subject in English language and a sample of hypertensive adults. One hundred and twenty-six studies were found. However, only 32 papers, 5 of which on resistance exercise and 27 on aerobic exercise were used for this study. Although the studies surveyed used different prescription models for resistance exercise, PEH was observed mainly in the laboratory setting. After aerobic exercise, it was noted that PEH occurred for longer periods. However, there are differences of opinion as to the best intensity and duration of the exercise to be prescribed. Therefore, in hypertensive individuals declines in arterial pressure following aerobic exercise are apparently greater than those observed with resistance exercise. Nevertheless, in order to achieve sounder conclusions, further studies on ambulatory blood pressure monitoring should be conducted.Post-exercise hypotension (PEH) may follow a session of physical exercises. This effect has high clinical relevance for hypertensive individuals. Although there are several studies on the subject, an analysis is still lacking on a state-of-art approach considering different types of exercises. Using a review of literature, the aim of this paper was to verify the relationship between aerobic exercise and resistance exercise in PEH in hypertensive people. For the purpose of this study, Scielo and Medlinedatabases were surveyed, and the main inclusion criteria were studies on the subject in English language and a sample of hypertensive adults. One hundred and twenty-six studies were found. However, only 32 papers, 5 of which on resistance exercise and 27 on aerobic exercise were used for this study. Although the studies surveyed used different prescription models for resistance exercise, PEH was observed mainly in the laboratory setting. After aerobic exercise, it was noted that PEH occurred for longer periods. However, there are differences of opinion as to the best intensity and duration of the exercise to be prescribed. Therefore, in hypertensive individuals declines in arterial pressure following aerobic exercise are apparently greater than those observed with resistance exercise. Nevertheless, in order to achieve sounder conclusions, further studies on ambulatory blood pressure monitoring should be conducted.

Efeitos do intervalo de recuperação entre as séries sobre a pressão arterial após exercícios resistidos

BACKGROUND Although studies have demonstrated the occurrence of postexercise hypotension (PEH) in resistance exercises, there is still no consensus on an ideal protocol. OBJECTIVE To evaluate the effects of different rest intervals (RI) between resistance exercise (RE) sets on postexercise blood pressure (BP). METHODS Sixteen sedentary non-hypertensive young men performed three RE protocols with RI of 1 (P1), 2 (2) and 3 (P3) minutes between the sets, as well as a control protocol (CON), in a counterbalanced manner. The RE protocols consisted of three sets of eight repetitions in six exercises. The loads used in the 1st, 2nd, and 3rd exercise sets were 80%, 70% and 60% of one repetition maximum (1RM), respectively. Measurements were taken at rest (RES), 15 (T15), 30 (T30), 45 (T45), 60 (T60), 75 (T75), and 90 (T90) minutes after the session. Factorial analysis of variance (Anova) was carried out, followed by post hoc LSD. RESULTS No significant change was found in systolic BP after the protocols. A significant increase in diastolic BP was verified after CON at timepoints T45 and T90. Significant reduction in diastolic BP occurred after P1 and P3, with duration of 30 and 15 minutes, respectively. No significant differences were found in the systolic and diastolic BP responses between the protocols with different RI. CONCLUSION RI does not seem to influence systolic BP reduction after an RE session. However, reductions in diastolic BP (P1 and P3) lasting up to 30 minutes were observed.FUNDAMENTO: Apesar de os estudos demonstrarem a ocorrencia da hipotensao pos-exercicio (HPE) em exercicios resistidos, ainda nao ha consenso sobre um protocolo ideal. OBJETIVO: Avaliar os efeitos de diferentes intervalos de recuperacao (IR) entre series de exercicio resistido (ER) na pressao arterial (PA) pos-exercicio. METODOS: Dezesseis homens jovens sedentarios e nao hipertensos realizaram, de forma contrabalanceada tres protocolos de ER com 1 (P1), 2 (P2) e 3 (P3) minutos de IR entre as series, e um protocolo controle (CON). Os protocolos de ER consistiram em tres series de oito repeticoes em seis exercicios. As cargas utilizadas na 1a, 2a e 3a serie dos exercicios foram respectivamente 80, 70 e 60% de 1 repeticao maxima (1RM). As medidas foram realizadas em repouso (REP), 15 (T15), 30 (T30), 45 (T45), 60 (T60), 75 (T75) e 90 (T90) minutos apos a sessao. Foi realizada uma analise de variância fatorial (ANOVA) com post hoc LSD. RESULTADOS: Nao foi encontrada alteracao significativa na PA sistolica apos os protocolos. Foi encontrado um aumento significativo da PA diastolica, apos o CON, nos momentos T45 e T90. Ocorreu reducao significativa na PA diastolica apos P1 e P3, com duracao de 30 e 15 minutos respectivamente. Nao foram encontradas diferencas significativas nas respostas da PA sistolica e diastolica entre os protocolos com diferentes IR. CONCLUSAO: Parece que o IR nao influencia a reducao da PA sistolica apos uma sessao de ER. No entanto, foi encontrada uma queda na PA diastolica (P1 e P3) com duracao de ate 30 minutos.